91964861 has 4 divisors (see below), whose sum is σ = 91994112. Its totient is φ = 91935612.

The previous prime is 91964819. The next prime is 91964903. The reversal of 91964861 is 16846919.

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 an interprime number because it is at equal distance from previous prime (91964819) and next prime (91964903).

It is a cyclic number.

It is not a de Polignac number, because 91964861 - 2¹⁴ = 91948477 is a prime.

It is a super-3 number, since 3×91964861³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91964261) by changing a digit.

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, 9251 + ... + 16416.

It is an arithmetic number, because the mean of its divisors is an integer number (22998528).

Almost surely, 2^91964861 is an apocalyptic number.

It is an amenable number.

91964861 is a deficient number, since it is larger than the sum of its proper divisors (29251).

91964861 is a wasteful number, since it uses less digits than its factorization.

91964861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29250.

The product of its digits is 93312, while the sum is 44.

The square root of 91964861 is about 9589.8311246862. The cubic root of 91964861 is about 451.3782615886.

The spelling of 91964861 in words is "ninety-one million, nine hundred sixty-four thousand, eight hundred sixty-one".