621341969 has 2 divisors, whose sum is σ = 621341970. Its totient is φ = 621341968.

The previous prime is 621341957. The next prime is 621342013. The reversal of 621341969 is 969143126.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320839744 + 300502225 = 17912^2 + 17335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621341969 is a prime.

It is a super-2 number, since 2×621341969² = 772131684881593922, which contains 22 as substring.

It is equal to p_32379638 and since 621341969 and 32379638 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (621343969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310670984 + 310670985.

It is an arithmetic number, because the mean of its divisors is an integer number (310670985).

Almost surely, 2^621341969 is an apocalyptic number.

It is an amenable number.

621341969 is a deficient number, since it is larger than the sum of its proper divisors (1).

621341969 is an equidigital number, since it uses as much as digits as its factorization.

621341969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 621341969 is about 24926.7320160506. The cubic root of 621341969 is about 853.3166697830.

The spelling of 621341969 in words is "six hundred twenty-one million, three hundred forty-one thousand, nine hundred sixty-nine".