621464859 has 8 divisors (see below), whose sum is σ = 920688720. Its totient is φ = 414309888.

The previous prime is 621464827. The next prime is 621464891. The reversal of 621464859 is 958464126.

It is an interprime number because it is at equal distance from previous prime (621464827) and next prime (621464891).

It is not a de Polignac number, because 621464859 - 2⁵ = 621464827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621460859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11508582 + ... + 11508635.

It is an arithmetic number, because the mean of its divisors is an integer number (115086090).

Almost surely, 2^621464859 is an apocalyptic number.

621464859 is a deficient number, since it is larger than the sum of its proper divisors (299223861).

621464859 is a wasteful number, since it uses less digits than its factorization.

621464859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23017226 (or 23017220 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 621464859 is about 24929.1969184729. The cubic root of 621464859 is about 853.3729228493.

The spelling of 621464859 in words is "six hundred twenty-one million, four hundred sixty-four thousand, eight hundred fifty-nine".