621677311 has 4 divisors (see below), whose sum is σ = 621742552. Its totient is φ = 621612072.

The previous prime is 621677239. The next prime is 621677339. The reversal of 621677311 is 113776126.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 621677311 - 2¹³ = 621669119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621677341) 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, 15240 + ... + 38413.

It is an arithmetic number, because the mean of its divisors is an integer number (155435638).

Almost surely, 2^621677311 is an apocalyptic number.

621677311 is a deficient number, since it is larger than the sum of its proper divisors (65241).

621677311 is a wasteful number, since it uses less digits than its factorization.

621677311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65240.

The product of its digits is 10584, while the sum is 34.

The square root of 621677311 is about 24933.4576623460. The cubic root of 621677311 is about 853.4701555546.

The spelling of 621677311 in words is "six hundred twenty-one million, six hundred seventy-seven thousand, three hundred eleven".