91379052 has 18 divisors (see below), whose sum is σ = 230986028. Its totient is φ = 30459672.

The previous prime is 91379039. The next prime is 91379053. The reversal of 91379052 is 25097319.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×91379052² = 16700262288837408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2538307 = 91379052 / (9 + 1 + 3 + 7 + 9 + 0 + 5 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 91378998 and 91379016.

It is not an unprimeable number, because it can be changed into a prime (91379053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1269118 + ... + 1269189.

Almost surely, 2^91379052 is an apocalyptic number.

It is an amenable number.

91379052 is an abundant number, since it is smaller than the sum of its proper divisors (139606976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91379052 is a wasteful number, since it uses less digits than its factorization.

91379052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538317 (or 2538312 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 91379052 is about 9559.2390910574. The cubic root of 91379052 is about 450.4178045600.

The spelling of 91379052 in words is "ninety-one million, three hundred seventy-nine thousand, fifty-two".