620458621 has 4 divisors (see below), whose sum is σ = 620688544. Its totient is φ = 620228700.

The previous prime is 620458613. The next prime is 620458667. The reversal of 620458621 is 126854026.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 620458621 - 2³ = 620458613 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 (620458681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110865 + ... + 116326.

It is an arithmetic number, because the mean of its divisors is an integer number (155172136).

Almost surely, 2^620458621 is an apocalyptic number.

It is an amenable number.

620458621 is a deficient number, since it is larger than the sum of its proper divisors (229923).

620458621 is a wasteful number, since it uses less digits than its factorization.

620458621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229922.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 620458621 is about 24909.0068248415. The cubic root of 620458621 is about 852.9120975816.

The spelling of 620458621 in words is "six hundred twenty million, four hundred fifty-eight thousand, six hundred twenty-one".