918961245 has 18 divisors (see below), whose sum is σ = 1593218718. Its totient is φ = 490004208.

The previous prime is 918961189. The next prime is 918961247. The reversal of 918961245 is 542169819.

It can be written as a sum of positive squares in only one way, i.e., 735168996 + 183792249 = 27114^2 + 13557^2 .

It is not a de Polignac number, because 918961245 - 2⁸ = 918960989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 918961245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918961247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 201096 + ... + 205614.

It is an arithmetic number, because the mean of its divisors is an integer number (88512151).

Almost surely, 2^918961245 is an apocalyptic number.

It is an amenable number.

918961245 is a deficient number, since it is larger than the sum of its proper divisors (674257473).

918961245 is an frugal number, since it uses more digits than its factorization.

918961245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9049 (or 4527 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 918961245 is about 30314.3735709646. The cubic root of 918961245 is about 972.2226443439. Note that the first 3 decimals are identical.

Multiplying 918961245 by its sum of digits (45), we get a square (41353256025 = 203355²).

918961245 divided by its sum of digits (45) gives a square (20421361 = 4519²).

The spelling of 918961245 in words is "nine hundred eighteen million, nine hundred sixty-one thousand, two hundred forty-five".