621713377 has 4 divisors (see below), whose sum is σ = 625886100. Its totient is φ = 617540656.

The previous prime is 621713303. The next prime is 621713431. The reversal of 621713377 is 773317126.

621713377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 401962401 + 219750976 = 20049^2 + 14824^2 .

It is a cyclic number.

It is not a de Polignac number, because 621713377 - 2¹⁹ = 621189089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621713177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2086138 + ... + 2086435.

It is an arithmetic number, because the mean of its divisors is an integer number (156471525).

Almost surely, 2^621713377 is an apocalyptic number.

It is an amenable number.

621713377 is a deficient number, since it is larger than the sum of its proper divisors (4172723).

621713377 is a wasteful number, since it uses less digits than its factorization.

621713377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172722.

The product of its digits is 37044, while the sum is 37.

The square root of 621713377 is about 24934.1808969134. The cubic root of 621713377 is about 853.4866596470.

The spelling of 621713377 in words is "six hundred twenty-one million, seven hundred thirteen thousand, three hundred seventy-seven".