91619379 has 12 divisors (see below), whose sum is σ = 135567432. Its totient is φ = 59589600.

The previous prime is 91619371. The next prime is 91619399. The reversal of 91619379 is 97391619.

It is not a de Polignac number, because 91619379 - 2³ = 91619371 is a prime.

It is a super-2 number, since 2×91619379² = 16788221216691282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91619371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123777 + ... + 124514.

It is an arithmetic number, because the mean of its divisors is an integer number (11297286).

Almost surely, 2^91619379 is an apocalyptic number.

91619379 is a deficient number, since it is larger than the sum of its proper divisors (43948053).

91619379 is a wasteful number, since it uses less digits than its factorization.

91619379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248338 (or 248335 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 91619379 is about 9571.8012411458. The cubic root of 91619379 is about 450.8123253270.

The spelling of 91619379 in words is "ninety-one million, six hundred nineteen thousand, three hundred seventy-nine".