621061747 has 2 divisors, whose sum is σ = 621061748. Its totient is φ = 621061746.

The previous prime is 621061741. The next prime is 621061751. The reversal of 621061747 is 747160126.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621061747 - 2²⁷ = 486844019 is a prime.

It is equal to p_32365861 and since 621061747 and 32365861 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 (621061741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310530873 + 310530874.

It is an arithmetic number, because the mean of its divisors is an integer number (310530874).

Almost surely, 2^621061747 is an apocalyptic number.

621061747 is a deficient number, since it is larger than the sum of its proper divisors (1).

621061747 is an equidigital number, since it uses as much as digits as its factorization.

621061747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 621061747 is about 24921.1104688375. The cubic root of 621061747 is about 853.1883700319.

The spelling of 621061747 in words is "six hundred twenty-one million, sixty-one thousand, seven hundred forty-seven".