91139153 has 4 divisors (see below), whose sum is σ = 104159040. Its totient is φ = 78119268.

The previous prime is 91139149. The next prime is 91139161. The reversal of 91139153 is 35193119.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35193119 = 13 ⋅2707163.

It is a cyclic number.

It is not a de Polignac number, because 91139153 - 2² = 91139149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91139453) 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, 6509933 + ... + 6509946.

It is an arithmetic number, because the mean of its divisors is an integer number (26039760).

Almost surely, 2^91139153 is an apocalyptic number.

It is an amenable number.

91139153 is a deficient number, since it is larger than the sum of its proper divisors (13019887).

91139153 is a wasteful number, since it uses less digits than its factorization.

91139153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13019886.

The product of its digits is 3645, while the sum is 32.

The square root of 91139153 is about 9546.6828270347. The cubic root of 91139153 is about 450.0232959133.

The spelling of 91139153 in words is "ninety-one million, one hundred thirty-nine thousand, one hundred fifty-three".