91779934 has 4 divisors (see below), whose sum is σ = 137669904. Its totient is φ = 45889966.

The previous prime is 91779917. The next prime is 91779949. The reversal of 91779934 is 43997719.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43997719 = 83 ⋅530093.

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, 22944982 + ... + 22944985.

It is an arithmetic number, because the mean of its divisors is an integer number (34417476).

Almost surely, 2^91779934 is an apocalyptic number.

91779934 is a deficient number, since it is larger than the sum of its proper divisors (45889970).

91779934 is a wasteful number, since it uses less digits than its factorization.

91779934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45889969.

The product of its digits is 428652, while the sum is 49.

The square root of 91779934 is about 9580.1844449885. The cubic root of 91779934 is about 451.0755081268.

The spelling of 91779934 in words is "ninety-one million, seven hundred seventy-nine thousand, nine hundred thirty-four".