621230387 has 2 divisors, whose sum is σ = 621230388. Its totient is φ = 621230386.

The previous prime is 621230377. The next prime is 621230429. The reversal of 621230387 is 783032126.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621230387 - 2²⁶ = 554121523 is a prime.

It is not a weakly prime, because it can be changed into another prime (621230347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310615193 + 310615194.

It is an arithmetic number, because the mean of its divisors is an integer number (310615194).

Almost surely, 2^621230387 is an apocalyptic number.

621230387 is a deficient number, since it is larger than the sum of its proper divisors (1).

621230387 is an equidigital number, since it uses as much as digits as its factorization.

621230387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 621230387 is about 24924.4937160216. The cubic root of 621230387 is about 853.2655865440.

The spelling of 621230387 in words is "six hundred twenty-one million, two hundred thirty thousand, three hundred eighty-seven".