91379407 has 8 divisors (see below), whose sum is σ = 104960000. Its totient is φ = 77930424.

The previous prime is 91379401. The next prime is 91379423. The reversal of 91379407 is 70497319.

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 91379407 - 2³ = 91379399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91379407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91379401) 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, 31407 + ... + 34192.

It is an arithmetic number, because the mean of its divisors is an integer number (13120000).

Almost surely, 2^91379407 is an apocalyptic number.

91379407 is a deficient number, since it is larger than the sum of its proper divisors (13580593).

91379407 is a wasteful number, since it uses less digits than its factorization.

91379407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65805.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 91379407 is about 9559.2576594629. The cubic root of 91379407 is about 450.4183878378.

The spelling of 91379407 in words is "ninety-one million, three hundred seventy-nine thousand, four hundred seven".