913945 has 4 divisors (see below), whose sum is σ = 1096740. Its totient is φ = 731152.

The previous prime is 913943. The next prime is 913981. The reversal of 913945 is 549319.

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 331776 + 582169 = 576^2 + 763^2 .

It is a cyclic number.

It is not a de Polignac number, because 913945 - 2¹ = 913943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (913943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91390 + ... + 91399.

It is an arithmetic number, because the mean of its divisors is an integer number (274185).

2⁹¹³⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

913945 is a deficient number, since it is larger than the sum of its proper divisors (182795).

913945 is a wasteful number, since it uses less digits than its factorization.

913945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182794.

The product of its digits is 4860, while the sum is 31.

The square root of 913945 is about 956.0047071014. The cubic root of 913945 is about 97.0450423185.

The spelling of 913945 in words is "nine hundred thirteen thousand, nine hundred forty-five".