91380079 has 8 divisors (see below), whose sum is σ = 106656768. Its totient is φ = 76659000.

The previous prime is 91380077. The next prime is 91380089. The reversal of 91380079 is 97008319.

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 91380079 - 2¹ = 91380077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91380077) 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, 138547 + ... + 139204.

It is an arithmetic number, because the mean of its divisors is an integer number (13332096).

Almost surely, 2^91380079 is an apocalyptic number.

91380079 is a deficient number, since it is larger than the sum of its proper divisors (15276689).

91380079 is a wasteful number, since it uses less digits than its factorization.

91380079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277805.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 91380079 is about 9559.2928085711. The cubic root of 91380079 is about 450.4194919538.

The spelling of 91380079 in words is "ninety-one million, three hundred eighty thousand, seventy-nine".