621247798 has 4 divisors (see below), whose sum is σ = 931871700. Its totient is φ = 310623898.

The previous prime is 621247787. The next prime is 621247811. The reversal of 621247798 is 897742126.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×621247798³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155311948 + ... + 155311951.

It is an arithmetic number, because the mean of its divisors is an integer number (232967925).

Almost surely, 2^621247798 is an apocalyptic number.

621247798 is a deficient number, since it is larger than the sum of its proper divisors (310623902).

621247798 is a wasteful number, since it uses less digits than its factorization.

621247798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310623901.

The product of its digits is 338688, while the sum is 46.

The square root of 621247798 is about 24924.8429884724. The cubic root of 621247798 is about 853.2735578585.

The spelling of 621247798 in words is "six hundred twenty-one million, two hundred forty-seven thousand, seven hundred ninety-eight".