117900405 has 24 divisors (see below), whose sum is σ = 233555712. Its totient is φ = 53897184.

The previous prime is 117900403. The next prime is 117900407. The reversal of 117900405 is 504009711.

It is an interprime number because it is at equal distance from previous prime (117900403) and next prime (117900407).

It is not a de Polignac number, because 117900405 - 2¹ = 117900403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117900403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186829 + ... + 187458.

It is an arithmetic number, because the mean of its divisors is an integer number (9731488).

Almost surely, 2^117900405 is an apocalyptic number.

117900405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

117900405 is a deficient number, since it is larger than the sum of its proper divisors (115655307).

117900405 is a wasteful number, since it uses less digits than its factorization.

117900405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374305 (or 374302 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 117900405 is about 10858.1952920363. The cubic root of 117900405 is about 490.3487798638.

The spelling of 117900405 in words is "one hundred seventeen million, nine hundred thousand, four hundred five".