91649395 has 4 divisors (see below), whose sum is σ = 109979280. Its totient is φ = 73319512.

The previous prime is 91649377. The next prime is 91649413. The reversal of 91649395 is 59394619.

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

It is an interprime number because it is at equal distance from previous prime (91649377) and next prime (91649413).

It is a cyclic number.

It is not a de Polignac number, because 91649395 - 2¹⁵ = 91616627 is a prime.

It is a super-2 number, since 2×91649395² = 16799223207732050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9164935 + ... + 9164944.

It is an arithmetic number, because the mean of its divisors is an integer number (27494820).

Almost surely, 2^91649395 is an apocalyptic number.

91649395 is a deficient number, since it is larger than the sum of its proper divisors (18329885).

91649395 is a wasteful number, since it uses less digits than its factorization.

91649395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18329884.

The product of its digits is 262440, while the sum is 46.

The square root of 91649395 is about 9573.3690516975. The cubic root of 91649395 is about 450.8615511038.

The spelling of 91649395 in words is "ninety-one million, six hundred forty-nine thousand, three hundred ninety-five".