621998373 has 8 divisors (see below), whose sum is σ = 829579168. Its totient is φ = 414541584.

The previous prime is 621998371. The next prime is 621998401. The reversal of 621998373 is 373899126.

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

It is not a de Polignac number, because 621998373 - 2¹ = 621998371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621998371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18586 + ... + 39867.

It is an arithmetic number, because the mean of its divisors is an integer number (103697396).

Almost surely, 2^621998373 is an apocalyptic number.

It is an amenable number.

621998373 is a deficient number, since it is larger than the sum of its proper divisors (207580795).

621998373 is a wasteful number, since it uses less digits than its factorization.

621998373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62003.

The product of its digits is 489888, while the sum is 48.

The square root of 621998373 is about 24939.8952082802. The cubic root of 621998373 is about 853.6170536705.

The spelling of 621998373 in words is "six hundred twenty-one million, nine hundred ninety-eight thousand, three hundred seventy-three".