721274198 has 8 divisors (see below), whose sum is σ = 1145553192. Its totient is φ = 339423136.

The previous prime is 721274149. The next prime is 721274207. The reversal of 721274198 is 891472127.

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, 10606940 + ... + 10607007.

It is an arithmetic number, because the mean of its divisors is an integer number (143194149).

Almost surely, 2^721274198 is an apocalyptic number.

721274198 is a deficient number, since it is larger than the sum of its proper divisors (424278994).

721274198 is a wasteful number, since it uses less digits than its factorization.

721274198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21213966.

The product of its digits is 56448, while the sum is 41.

The square root of 721274198 is about 26856.5485124206. The cubic root of 721274198 is about 896.8093596624.

The spelling of 721274198 in words is "seven hundred twenty-one million, two hundred seventy-four thousand, one hundred ninety-eight".