621377 has 4 divisors (see below), whose sum is σ = 623280. Its totient is φ = 619476.

The previous prime is 621371. The next prime is 621389. The reversal of 621377 is 773126.

621377 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621377 is a prime.

It is a super-2 number, since 2×621377² = 772218752258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621371) 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, 323 + ... + 1160.

It is an arithmetic number, because the mean of its divisors is an integer number (155820).

2⁶²¹³⁷⁷ is an apocalyptic number.

It is an amenable number.

621377 is a deficient number, since it is larger than the sum of its proper divisors (1903).

621377 is a wasteful number, since it uses less digits than its factorization.

621377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902.

The product of its digits is 1764, while the sum is 26.

The square root of 621377 is about 788.2746983127. The cubic root of 621377 is about 85.3332706027. Note that the first 3 decimals are identical.

The spelling of 621377 in words is "six hundred twenty-one thousand, three hundred seventy-seven".