621302987 has 2 divisors, whose sum is σ = 621302988. Its totient is φ = 621302986.

The previous prime is 621302947. The next prime is 621303013. The reversal of 621302987 is 789203126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621302987 - 2¹⁶ = 621237451 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 621302987.

It is not a weakly prime, because it can be changed into another prime (621302947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310651493 + 310651494.

It is an arithmetic number, because the mean of its divisors is an integer number (310651494).

Almost surely, 2^621302987 is an apocalyptic number.

621302987 is a deficient number, since it is larger than the sum of its proper divisors (1).

621302987 is an equidigital number, since it uses as much as digits as its factorization.

621302987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 621302987 is about 24925.9500721637. The cubic root of 621302987 is about 853.2988241694.

The spelling of 621302987 in words is "six hundred twenty-one million, three hundred two thousand, nine hundred eighty-seven".