621045487 has 2 divisors, whose sum is σ = 621045488. Its totient is φ = 621045486.

The previous prime is 621045461. The next prime is 621045499. The reversal of 621045487 is 784540126.

621045487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621045487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621045427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310522743 + 310522744.

It is an arithmetic number, because the mean of its divisors is an integer number (310522744).

Almost surely, 2^621045487 is an apocalyptic number.

621045487 is a deficient number, since it is larger than the sum of its proper divisors (1).

621045487 is an equidigital number, since it uses as much as digits as its factorization.

621045487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 621045487 is about 24920.7842372587. The cubic root of 621045487 is about 853.1809242001.

The spelling of 621045487 in words is "six hundred twenty-one million, forty-five thousand, four hundred eighty-seven".