891752945 has 4 divisors (see below), whose sum is σ = 1070103540. Its totient is φ = 713402352.

The previous prime is 891752921. The next prime is 891752957. The reversal of 891752945 is 549257198.

891752945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 620557921 + 271195024 = 24911^2 + 16468^2 .

It is a cyclic number.

It is not a de Polignac number, because 891752945 - 2¹² = 891748849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 891752893 and 891752902.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89175290 + ... + 89175299.

It is an arithmetic number, because the mean of its divisors is an integer number (267525885).

Almost surely, 2^891752945 is an apocalyptic number.

It is an amenable number.

891752945 is a deficient number, since it is larger than the sum of its proper divisors (178350595).

891752945 is a wasteful number, since it uses less digits than its factorization.

891752945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178350594.

The product of its digits is 907200, while the sum is 50.

The square root of 891752945 is about 29862.2327530947. The cubic root of 891752945 is about 962.5312773330.

The spelling of 891752945 in words is "eight hundred ninety-one million, seven hundred fifty-two thousand, nine hundred forty-five".