91941974 has 8 divisors (see below), whose sum is σ = 137980128. Its totient is φ = 45948600.

The previous prime is 91941953. The next prime is 91941979. The reversal of 91941974 is 47914919.

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 (91941979) 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, 5477 + ... + 14624.

It is an arithmetic number, because the mean of its divisors is an integer number (17247516).

Almost surely, 2^91941974 is an apocalyptic number.

91941974 is a deficient number, since it is larger than the sum of its proper divisors (46038154).

91941974 is a wasteful number, since it uses less digits than its factorization.

91941974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22390.

The product of its digits is 81648, while the sum is 44.

The square root of 91941974 is about 9588.6377551767. The cubic root of 91941974 is about 451.3408141286.

The spelling of 91941974 in words is "ninety-one million, nine hundred forty-one thousand, nine hundred seventy-four".