91144349 has 4 divisors (see below), whose sum is σ = 95941440. Its totient is φ = 86347260.

The previous prime is 91144297. The next prime is 91144363. The reversal of 91144349 is 94344119.

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 91144349 - 2⁸ = 91144093 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 (91144379) 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, 2398517 + ... + 2398554.

It is an arithmetic number, because the mean of its divisors is an integer number (23985360).

Almost surely, 2^91144349 is an apocalyptic number.

It is an amenable number.

91144349 is a deficient number, since it is larger than the sum of its proper divisors (4797091).

91144349 is a wasteful number, since it uses less digits than its factorization.

91144349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797090.

The product of its digits is 15552, while the sum is 35.

The square root of 91144349 is about 9546.9549595670. The cubic root of 91144349 is about 450.0318479517.

The spelling of 91144349 in words is "ninety-one million, one hundred forty-four thousand, three hundred forty-nine".