91553311 has 2 divisors, whose sum is σ = 91553312. Its totient is φ = 91553310.

The previous prime is 91553303. The next prime is 91553327. The reversal of 91553311 is 11335519.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91553311 - 2³ = 91553303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91553311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91553611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45776655 + 45776656.

It is an arithmetic number, because the mean of its divisors is an integer number (45776656).

Almost surely, 2^91553311 is an apocalyptic number.

91553311 is a deficient number, since it is larger than the sum of its proper divisors (1).

91553311 is an equidigital number, since it uses as much as digits as its factorization.

91553311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2025, while the sum is 28.

The square root of 91553311 is about 9568.3494396892. The cubic root of 91553311 is about 450.7039369374.

The spelling of 91553311 in words is "ninety-one million, five hundred fifty-three thousand, three hundred eleven".