91951401 has 16 divisors (see below), whose sum is σ = 131393664. Its totient is φ = 57049344.

The previous prime is 91951399. The next prime is 91951423. The reversal of 91951401 is 10415919.

It is not a de Polignac number, because 91951401 - 2¹ = 91951399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91951471) by changing a digit.

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, 15456 + ... + 20561.

It is an arithmetic number, because the mean of its divisors is an integer number (8212104).

Almost surely, 2^91951401 is an apocalyptic number.

It is an amenable number.

91951401 is a deficient number, since it is larger than the sum of its proper divisors (39442263).

91951401 is a wasteful number, since it uses less digits than its factorization.

91951401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36080.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 91951401 is about 9589.1293139680. The cubic root of 91951401 is about 451.3562392359.

The spelling of 91951401 in words is "ninety-one million, nine hundred fifty-one thousand, four hundred one".