91903117 has 8 divisors (see below), whose sum is σ = 95248440. Its totient is φ = 88569600.

The previous prime is 91903109. The next prime is 91903159. The reversal of 91903117 is 71130919.

It can be written as a sum of positive squares in 4 ways, for example, as 28366276 + 63536841 = 5326^2 + 7971^2 .

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 91903117 - 2³ = 91903109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91903177) 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, 14793 + ... + 20065.

It is an arithmetic number, because the mean of its divisors is an integer number (11906055).

Almost surely, 2^91903117 is an apocalyptic number.

It is an amenable number.

91903117 is a deficient number, since it is larger than the sum of its proper divisors (3345323).

91903117 is a wasteful number, since it uses less digits than its factorization.

91903117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 91903117 is about 9586.6113408232. The cubic root of 91903117 is about 451.2772224940.

The spelling of 91903117 in words is "ninety-one million, nine hundred three thousand, one hundred seventeen".