91659673 has 4 divisors (see below), whose sum is σ = 104753920. Its totient is φ = 78565428.

The previous prime is 91659593. The next prime is 91659683. The reversal of 91659673 is 37695619.

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 91659673 - 2¹⁷ = 91528601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91659683) 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, 6547113 + ... + 6547126.

It is an arithmetic number, because the mean of its divisors is an integer number (26188480).

Almost surely, 2^91659673 is an apocalyptic number.

It is an amenable number.

91659673 is a deficient number, since it is larger than the sum of its proper divisors (13094247).

91659673 is a wasteful number, since it uses less digits than its factorization.

91659673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13094246.

The product of its digits is 306180, while the sum is 46.

The square root of 91659673 is about 9573.9058382668. The cubic root of 91659673 is about 450.8784043950.

The spelling of 91659673 in words is "ninety-one million, six hundred fifty-nine thousand, six hundred seventy-three".