91901951 has 12 divisors (see below), whose sum is σ = 98335056. Its totient is φ = 85726080.

The previous prime is 91901939. The next prime is 91901959. The reversal of 91901951 is 15910919.

It is not a de Polignac number, because 91901951 - 2¹⁴ = 91885567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91901959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37475 + ... + 39851.

It is an arithmetic number, because the mean of its divisors is an integer number (8194588).

Almost surely, 2^91901951 is an apocalyptic number.

91901951 is a deficient number, since it is larger than the sum of its proper divisors (6433105).

91901951 is a wasteful number, since it uses less digits than its factorization.

91901951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482 (or 2441 counting only the distinct ones).

The product of its (nonzero) digits is 3645, while the sum is 35.

The square root of 91901951 is about 9586.5505266493. The cubic root of 91901951 is about 451.2753139934.

The spelling of 91901951 in words is "ninety-one million, nine hundred one thousand, nine hundred fifty-one".