91678053 has 4 divisors (see below), whose sum is σ = 122237408. Its totient is φ = 61118700.

The previous prime is 91678049. The next prime is 91678057. The reversal of 91678053 is 35087619.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (91678049) and next prime (91678057).

It is not a de Polignac number, because 91678053 - 2² = 91678049 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 (91678057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15279673 + ... + 15279678.

It is an arithmetic number, because the mean of its divisors is an integer number (30559352).

Almost surely, 2^91678053 is an apocalyptic number.

It is an amenable number.

91678053 is a deficient number, since it is larger than the sum of its proper divisors (30559355).

91678053 is a wasteful number, since it uses less digits than its factorization.

91678053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30559354.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 91678053 is about 9574.8656909640. The cubic root of 91678053 is about 450.9085397531.

The spelling of 91678053 in words is "ninety-one million, six hundred seventy-eight thousand, fifty-three".