91973398 has 8 divisors (see below), whose sum is σ = 150501960. Its totient is φ = 41806080.

The previous prime is 91973393. The next prime is 91973419. The reversal of 91973398 is 89337919.

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 (91973393) 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, 2090283 + ... + 2090326.

It is an arithmetic number, because the mean of its divisors is an integer number (18812745).

Almost surely, 2^91973398 is an apocalyptic number.

91973398 is a deficient number, since it is larger than the sum of its proper divisors (58528562).

91973398 is a wasteful number, since it uses less digits than its factorization.

91973398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180622.

The product of its digits is 367416, while the sum is 49.

The square root of 91973398 is about 9590.2762212566. The cubic root of 91973398 is about 451.3922281441.

The spelling of 91973398 in words is "ninety-one million, nine hundred seventy-three thousand, three hundred ninety-eight".