117911925 has 18 divisors (see below), whose sum is σ = 211193762. Its totient is φ = 62886240.

The previous prime is 117911923. The next prime is 117911947. The reversal of 117911925 is 529119711.

It can be written as a sum of positive squares in 3 ways, for example, as 1077444 + 116834481 = 1038^2 + 10809^2 .

It is not a de Polignac number, because 117911925 - 2¹ = 117911923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117911925.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117911923) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 261802 + ... + 262251.

Almost surely, 2^117911925 is an apocalyptic number.

117911925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117911925 is a deficient number, since it is larger than the sum of its proper divisors (93281837).

117911925 is a wasteful number, since it uses less digits than its factorization.

117911925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524069 (or 524061 counting only the distinct ones).

The product of its digits is 5670, while the sum is 36.

The square root of 117911925 is about 10858.7257539732. The cubic root of 117911925 is about 490.3647499361.

The spelling of 117911925 in words is "one hundred seventeen million, nine hundred eleven thousand, nine hundred twenty-five".