621612047 has 16 divisors (see below), whose sum is σ = 717315840. Its totient is φ = 527660352.

The previous prime is 621611981. The next prime is 621612091. The reversal of 621612047 is 740216126.

It is a cyclic number.

It is not a de Polignac number, because 621612047 - 2²⁸ = 353176591 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 (621612347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353723 + ... + 355475.

It is an arithmetic number, because the mean of its divisors is an integer number (44832240).

Almost surely, 2^621612047 is an apocalyptic number.

621612047 is a deficient number, since it is larger than the sum of its proper divisors (95703793).

621612047 is a wasteful number, since it uses less digits than its factorization.

621612047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 621612047 is about 24932.1488644681. The cubic root of 621612047 is about 853.4402885992.

The spelling of 621612047 in words is "six hundred twenty-one million, six hundred twelve thousand, forty-seven".