91420631201 has 4 divisors (see below), whose sum is σ = 91453389504. Its totient is φ = 91387872900.

The previous prime is 91420631177. The next prime is 91420631207. The reversal of 91420631201 is 10213602419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91420631201 - 2¹⁸ = 91420369057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91420631207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16374965 + ... + 16380546.

It is an arithmetic number, because the mean of its divisors is an integer number (22863347376).

Almost surely, 2^91420631201 is an apocalyptic number.

It is an amenable number.

91420631201 is a deficient number, since it is larger than the sum of its proper divisors (32758303).

91420631201 is a wasteful number, since it uses less digits than its factorization.

91420631201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32758302.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 91420631201 in words is "ninety-one billion, four hundred twenty million, six hundred thirty-one thousand, two hundred one".