621060431 has 2 divisors, whose sum is σ = 621060432. Its totient is φ = 621060430.

The previous prime is 621060361. The next prime is 621060457. The reversal of 621060431 is 134060126.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621060431 is a prime.

It is a super-2 number, since 2×621060431² = 771432117907811522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 621060397 and 621060406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621060631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310530215 + 310530216.

It is an arithmetic number, because the mean of its divisors is an integer number (310530216).

Almost surely, 2^621060431 is an apocalyptic number.

621060431 is a deficient number, since it is larger than the sum of its proper divisors (1).

621060431 is an equidigital number, since it uses as much as digits as its factorization.

621060431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 621060431 is about 24921.0840655057. The cubic root of 621060431 is about 853.1877674098.

The spelling of 621060431 in words is "six hundred twenty-one million, sixty thousand, four hundred thirty-one".