915920793 has 12 divisors (see below), whose sum is σ = 1325872548. Its totient is φ = 609286560.

The previous prime is 915920777. The next prime is 915920801. The reversal of 915920793 is 397029519.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 494973504 + 420947289 = 22248^2 + 20517^2 .

It is not a de Polignac number, because 915920793 - 2⁴ = 915920777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (915920723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106230 + ... + 114527.

It is an arithmetic number, because the mean of its divisors is an integer number (110489379).

Almost surely, 2^915920793 is an apocalyptic number.

It is an amenable number.

915920793 is a deficient number, since it is larger than the sum of its proper divisors (409951755).

915920793 is a wasteful number, since it uses less digits than its factorization.

915920793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221224 (or 221221 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 915920793 is about 30264.1833360823. The cubic root of 915920793 is about 971.1492358804.

The spelling of 915920793 in words is "nine hundred fifteen million, nine hundred twenty thousand, seven hundred ninety-three".