621372677 has 4 divisors (see below), whose sum is σ = 621451116. Its totient is φ = 621294240.

The previous prime is 621372667. The next prime is 621372721. The reversal of 621372677 is 776273126.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 260144641 + 361228036 = 16129^2 + 19006^2 .

It is a cyclic number.

It is not a de Polignac number, because 621372677 - 2⁸ = 621372421 is a prime.

It is a super-2 number, since 2×621372677² = 772208007444292658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621372607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25808 + ... + 43689.

It is an arithmetic number, because the mean of its divisors is an integer number (155362779).

Almost surely, 2^621372677 is an apocalyptic number.

It is an amenable number.

621372677 is a deficient number, since it is larger than the sum of its proper divisors (78439).

621372677 is an equidigital number, since it uses as much as digits as its factorization.

621372677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78438.

The product of its digits is 148176, while the sum is 41.

The square root of 621372677 is about 24927.3479736614. The cubic root of 621372677 is about 853.3307271072.

The spelling of 621372677 in words is "six hundred twenty-one million, three hundred seventy-two thousand, six hundred seventy-seven".