621061871 has 2 divisors, whose sum is σ = 621061872. Its totient is φ = 621061870.

The previous prime is 621061829. The next prime is 621061933. The reversal of 621061871 is 178160126.

It is a happy number.

621061871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 621061871 - 2¹⁴ = 621045487 is a prime.

It is a super-2 number, since 2×621061871² = 771435695220041282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621061171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310530935 + 310530936.

It is an arithmetic number, because the mean of its divisors is an integer number (310530936).

Almost surely, 2^621061871 is an apocalyptic number.

621061871 is a deficient number, since it is larger than the sum of its proper divisors (1).

621061871 is an equidigital number, since it uses as much as digits as its factorization.

621061871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 621061871 is about 24921.1129566879. The cubic root of 621061871 is about 853.1884268139.

The spelling of 621061871 in words is "six hundred twenty-one million, sixty-one thousand, eight hundred seventy-one".