915725905 has 8 divisors (see below), whose sum is σ = 1100374632. Its totient is φ = 731578368.

The previous prime is 915725903. The next prime is 915725981. The reversal of 915725905 is 509527519.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 432473616 + 483252289 = 20796^2 + 21983^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 915725905 - 2¹ = 915725903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (915725903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121264 + ... + 128593.

It is an arithmetic number, because the mean of its divisors is an integer number (137546829).

Almost surely, 2^915725905 is an apocalyptic number.

It is an amenable number.

915725905 is a deficient number, since it is larger than the sum of its proper divisors (184648727).

915725905 is a wasteful number, since it uses less digits than its factorization.

915725905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250595.

The product of its (nonzero) digits is 141750, while the sum is 43.

The square root of 915725905 is about 30260.9633851931. The cubic root of 915725905 is about 971.0803511911.

The spelling of 915725905 in words is "nine hundred fifteen million, seven hundred twenty-five thousand, nine hundred five".