621401359 has 2 divisors, whose sum is σ = 621401360. Its totient is φ = 621401358.

The previous prime is 621401321. The next prime is 621401383. The reversal of 621401359 is 953104126.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621401359 is a prime.

It is a super-3 number, since 3×621401359³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 621401359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621401059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310700679 + 310700680.

It is an arithmetic number, because the mean of its divisors is an integer number (310700680).

Almost surely, 2^621401359 is an apocalyptic number.

621401359 is a deficient number, since it is larger than the sum of its proper divisors (1).

621401359 is an equidigital number, since it uses as much as digits as its factorization.

621401359 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 621401359 is about 24927.9232789256. The cubic root of 621401359 is about 853.3438565631.

The spelling of 621401359 in words is "six hundred twenty-one million, four hundred one thousand, three hundred fifty-nine".