621312477 has 4 divisors (see below), whose sum is σ = 828416640. Its totient is φ = 414208316.

The previous prime is 621312467. The next prime is 621312493. The reversal of 621312477 is 774213126.

621312477 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 not a de Polignac number, because 621312477 - 2¹⁵ = 621279709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621312437) 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, 103552077 + ... + 103552082.

It is an arithmetic number, because the mean of its divisors is an integer number (207104160).

Almost surely, 2^621312477 is an apocalyptic number.

It is an amenable number.

621312477 is a deficient number, since it is larger than the sum of its proper divisors (207104163).

621312477 is a wasteful number, since it uses less digits than its factorization.

621312477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207104162.

The product of its digits is 14112, while the sum is 33.

The square root of 621312477 is about 24926.1404352940. The cubic root of 621312477 is about 853.3031686759.

The spelling of 621312477 in words is "six hundred twenty-one million, three hundred twelve thousand, four hundred seventy-seven".