91677398 has 4 divisors (see below), whose sum is σ = 137516100. Its totient is φ = 45838698.

The previous prime is 91677389. The next prime is 91677407. The reversal of 91677398 is 89377619.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (91677389) and next prime (91677407).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22919348 + ... + 22919351.

It is an arithmetic number, because the mean of its divisors is an integer number (34379025).

Almost surely, 2^91677398 is an apocalyptic number.

91677398 is a deficient number, since it is larger than the sum of its proper divisors (45838702).

91677398 is a wasteful number, since it uses less digits than its factorization.

91677398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45838701.

The product of its digits is 571536, while the sum is 50.

The square root of 91677398 is about 9574.8314867678. The cubic root of 91677398 is about 450.9074659018.

The spelling of 91677398 in words is "ninety-one million, six hundred seventy-seven thousand, three hundred ninety-eight".