621086377 has 2 divisors, whose sum is σ = 621086378. Its totient is φ = 621086376.

The previous prime is 621086369. The next prime is 621086413. The reversal of 621086377 is 773680126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436642816 + 184443561 = 20896^2 + 13581^2 .

It is a cyclic number.

It is not a de Polignac number, because 621086377 - 2³ = 621086369 is a prime.

It is a super-2 number, since 2×621086377² = 771496575389972258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (621086357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310543188 + 310543189.

It is an arithmetic number, because the mean of its divisors is an integer number (310543189).

Almost surely, 2^621086377 is an apocalyptic number.

It is an amenable number.

621086377 is a deficient number, since it is larger than the sum of its proper divisors (1).

621086377 is an equidigital number, since it uses as much as digits as its factorization.

621086377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 621086377 is about 24921.6046232982. The cubic root of 621086377 is about 853.1996484337.

The spelling of 621086377 in words is "six hundred twenty-one million, eighty-six thousand, three hundred seventy-seven".