75117905 has 16 divisors (see below), whose sum is σ = 91675584. Its totient is φ = 59079360.

The previous prime is 75117877. The next prime is 75117937. The reversal of 75117905 is 50971157.

It is not a de Polignac number, because 75117905 - 2⁸ = 75117649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131270 + ... + 131840.

It is an arithmetic number, because the mean of its divisors is an integer number (5729724).

Almost surely, 2^75117905 is an apocalyptic number.

It is an amenable number.

75117905 is a deficient number, since it is larger than the sum of its proper divisors (16557679).

75117905 is a wasteful number, since it uses less digits than its factorization.

75117905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its (nonzero) digits is 11025, while the sum is 35.

The square root of 75117905 is about 8667.0586129321. The cubic root of 75117905 is about 421.9372056787.

The spelling of 75117905 in words is "seventy-five million, one hundred seventeen thousand, nine hundred five".