91379771 has 8 divisors (see below), whose sum is σ = 105608160. Its totient is φ = 77444928.

The previous prime is 91379767. The next prime is 91379789. The reversal of 91379771 is 17797319.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91379771 - 2² = 91379767 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91379711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72716 + ... + 73961.

It is an arithmetic number, because the mean of its divisors is an integer number (13201020).

Almost surely, 2^91379771 is an apocalyptic number.

91379771 is a deficient number, since it is larger than the sum of its proper divisors (14228389).

91379771 is a wasteful number, since it uses less digits than its factorization.

91379771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146773.

The product of its digits is 83349, while the sum is 44.

The square root of 91379771 is about 9559.2766985792. The cubic root of 91379771 is about 450.4189859013.

The spelling of 91379771 in words is "ninety-one million, three hundred seventy-nine thousand, seven hundred seventy-one".