91172054 has 16 divisors (see below), whose sum is σ = 149475456. Its totient is φ = 41520000.

The previous prime is 91172041. The next prime is 91172077. The reversal of 91172054 is 45027119.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42197 + ... + 44304.

It is an arithmetic number, because the mean of its divisors is an integer number (9342216).

Almost surely, 2^91172054 is an apocalyptic number.

91172054 is a deficient number, since it is larger than the sum of its proper divisors (58303402).

91172054 is a wasteful number, since it uses less digits than its factorization.

91172054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86551.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 91172054 is about 9548.4058355309. The cubic root of 91172054 is about 450.0774418161.

The spelling of 91172054 in words is "ninety-one million, one hundred seventy-two thousand, fifty-four".