91839374 has 8 divisors (see below), whose sum is σ = 150282648. Its totient is φ = 41745160.

The previous prime is 91839373. The next prime is 91839383. The reversal of 91839374 is 47393819.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91839373) 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, 2087237 + ... + 2087280.

It is an arithmetic number, because the mean of its divisors is an integer number (18785331).

Almost surely, 2^91839374 is an apocalyptic number.

91839374 is a deficient number, since it is larger than the sum of its proper divisors (58443274).

91839374 is a wasteful number, since it uses less digits than its factorization.

91839374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4174530.

The product of its digits is 163296, while the sum is 44.

The square root of 91839374 is about 9583.2861795941. The cubic root of 91839374 is about 451.1728647093.

The spelling of 91839374 in words is "ninety-one million, eight hundred thirty-nine thousand, three hundred seventy-four".