91887379 has 8 divisors (see below), whose sum is σ = 94963712. Its totient is φ = 88818120.

The previous prime is 91887377. The next prime is 91887403. The reversal of 91887379 is 97378819.

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 91887379 - 2¹ = 91887377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91887377) 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, 43072 + ... + 45154.

It is an arithmetic number, because the mean of its divisors is an integer number (11870464).

Almost surely, 2^91887379 is an apocalyptic number.

91887379 is a deficient number, since it is larger than the sum of its proper divisors (3076333).

91887379 is a wasteful number, since it uses less digits than its factorization.

91887379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537.

The product of its digits is 762048, while the sum is 52.

The square root of 91887379 is about 9585.7904734038. The cubic root of 91887379 is about 451.2514612844.

The spelling of 91887379 in words is "ninety-one million, eight hundred eighty-seven thousand, three hundred seventy-nine".