621400147 has 2 divisors, whose sum is σ = 621400148. Its totient is φ = 621400146.

The previous prime is 621400127. The next prime is 621400159. The reversal of 621400147 is 741004126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621400147 - 2²⁷ = 487182419 is a prime.

It is a super-2 number, since 2×621400147² = 772276285383243218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (621400127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310700073 + 310700074.

It is an arithmetic number, because the mean of its divisors is an integer number (310700074).

Almost surely, 2^621400147 is an apocalyptic number.

621400147 is a deficient number, since it is larger than the sum of its proper divisors (1).

621400147 is an equidigital number, since it uses as much as digits as its factorization.

621400147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 621400147 is about 24927.8989688261. The cubic root of 621400147 is about 853.3433017668.

The spelling of 621400147 in words is "six hundred twenty-one million, four hundred thousand, one hundred forty-seven".