91723474 has 8 divisors (see below), whose sum is σ = 137639628. Its totient is φ = 45843600.

The previous prime is 91723447. The next prime is 91723487. The reversal of 91723474 is 47432719.

It can be written as a sum of positive squares in 2 ways, for example, as 91680625 + 42849 = 9575^2 + 207^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1477 + ... + 13624.

Almost surely, 2^91723474 is an apocalyptic number.

91723474 is a deficient number, since it is larger than the sum of its proper divisors (45916154).

91723474 is a wasteful number, since it uses less digits than its factorization.

91723474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140.

The product of its digits is 42336, while the sum is 37.

The square root of 91723474 is about 9577.2372843112. The cubic root of 91723474 is about 450.9829935426.

The spelling of 91723474 in words is "ninety-one million, seven hundred twenty-three thousand, four hundred seventy-four".