721947498 has 8 divisors (see below), whose sum is σ = 1443895008. Its totient is φ = 240649164.

The previous prime is 721947487. The next prime is 721947509. The reversal of 721947498 is 894749127.

It is an interprime number because it is at equal distance from previous prime (721947487) and next prime (721947509).

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

721947498 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 721947498.

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, 60162286 + ... + 60162297.

It is an arithmetic number, because the mean of its divisors is an integer number (180486876).

Almost surely, 2^721947498 is an apocalyptic number.

721947498 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721947498 is a wasteful number, since it uses less digits than its factorization.

721947498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120324588.

The product of its digits is 1016064, while the sum is 51.

The square root of 721947498 is about 26869.0807062691. The cubic root of 721947498 is about 897.0883261333.

The spelling of 721947498 in words is "seven hundred twenty-one million, nine hundred forty-seven thousand, four hundred ninety-eight".