91398974 has 8 divisors (see below), whose sum is σ = 141521088. Its totient is φ = 44225280.

The previous prime is 91398961. The next prime is 91398997. The reversal of 91398974 is 47989319.

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

It is a congruent number.

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, 737027 + ... + 737150.

It is an arithmetic number, because the mean of its divisors is an integer number (17690136).

Almost surely, 2^91398974 is an apocalyptic number.

91398974 is a deficient number, since it is larger than the sum of its proper divisors (50122114).

91398974 is a wasteful number, since it uses less digits than its factorization.

91398974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474210.

The product of its digits is 489888, while the sum is 50.

The square root of 91398974 is about 9560.2810628140. The cubic root of 91398974 is about 450.4505347875.

The spelling of 91398974 in words is "ninety-one million, three hundred ninety-eight thousand, nine hundred seventy-four".