91874797 has 4 divisors (see below), whose sum is σ = 104999776. Its totient is φ = 78749820.

The previous prime is 91874791. The next prime is 91874821. The reversal of 91874797 is 79747819.

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 a cyclic number.

It is not a de Polignac number, because 91874797 - 2¹⁹ = 91350509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91874791) 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, 6562479 + ... + 6562492.

It is an arithmetic number, because the mean of its divisors is an integer number (26249944).

Almost surely, 2^91874797 is an apocalyptic number.

It is an amenable number.

91874797 is a deficient number, since it is larger than the sum of its proper divisors (13124979).

91874797 is a wasteful number, since it uses less digits than its factorization.

91874797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13124978.

The product of its digits is 889056, while the sum is 52.

The square root of 91874797 is about 9585.1341670318. The cubic root of 91874797 is about 451.2308639507.

The spelling of 91874797 in words is "ninety-one million, eight hundred seventy-four thousand, seven hundred ninety-seven".