621012887 has 4 divisors (see below), whose sum is σ = 677468616. Its totient is φ = 564557160.

The previous prime is 621012881. The next prime is 621012901. The reversal of 621012887 is 788210126.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 621012887 - 2⁶ = 621012823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621012881) 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, 28227848 + ... + 28227869.

It is an arithmetic number, because the mean of its divisors is an integer number (169367154).

Almost surely, 2^621012887 is an apocalyptic number.

621012887 is a deficient number, since it is larger than the sum of its proper divisors (56455729).

621012887 is a wasteful number, since it uses less digits than its factorization.

621012887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56455728.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 621012887 is about 24920.1301561609. The cubic root of 621012887 is about 853.1659955111.

The spelling of 621012887 in words is "six hundred twenty-one million, twelve thousand, eight hundred eighty-seven".