91455213 has 4 divisors (see below), whose sum is σ = 121940288. Its totient is φ = 60970140.

The previous prime is 91455167. The next prime is 91455277. The reversal of 91455213 is 31255419.

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 not a de Polignac number, because 91455213 - 2⁶ = 91455149 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 (91455913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15242533 + ... + 15242538.

It is an arithmetic number, because the mean of its divisors is an integer number (30485072).

Almost surely, 2^91455213 is an apocalyptic number.

It is an amenable number.

91455213 is a deficient number, since it is larger than the sum of its proper divisors (30485075).

91455213 is a wasteful number, since it uses less digits than its factorization.

91455213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30485074.

The product of its digits is 5400, while the sum is 30.

The square root of 91455213 is about 9563.2218943199. The cubic root of 91455213 is about 450.5429052391.

The spelling of 91455213 in words is "ninety-one million, four hundred fifty-five thousand, two hundred thirteen".