621758032139 has 2 divisors, whose sum is σ = 621758032140. Its totient is φ = 621758032138.

The previous prime is 621758032121. The next prime is 621758032187. The reversal of 621758032139 is 931230857126.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621758032139 - 2³⁶ = 553038555403 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 621758032093 and 621758032102.

It is not a weakly prime, because it can be changed into another prime (621758032039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310879016069 + 310879016070.

It is an arithmetic number, because the mean of its divisors is an integer number (310879016070).

Almost surely, 2^621758032139 is an apocalyptic number.

621758032139 is a deficient number, since it is larger than the sum of its proper divisors (1).

621758032139 is an equidigital number, since it uses as much as digits as its factorization.

621758032139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 47.

The spelling of 621758032139 in words is "six hundred twenty-one billion, seven hundred fifty-eight million, thirty-two thousand, one hundred thirty-nine".