91252320143 has 4 divisors (see below), whose sum is σ = 91254949848. Its totient is φ = 91249690440.

The previous prime is 91252320139. The next prime is 91252320149. The reversal of 91252320143 is 34102325219.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91252320143 - 2² = 91252320139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91252320149) 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, 1262096 + ... + 1332437.

It is an arithmetic number, because the mean of its divisors is an integer number (22813737462).

Almost surely, 2^91252320143 is an apocalyptic number.

91252320143 is a deficient number, since it is larger than the sum of its proper divisors (2629705).

91252320143 is a wasteful number, since it uses less digits than its factorization.

91252320143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629704.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 91252320143 in words is "ninety-one billion, two hundred fifty-two million, three hundred twenty thousand, one hundred forty-three".