621883247 has 2 divisors, whose sum is σ = 621883248. Its totient is φ = 621883246.

The previous prime is 621883217. The next prime is 621883261. The reversal of 621883247 is 742388126.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 621883247 - 2¹² = 621879151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (621883217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310941623 + 310941624.

It is an arithmetic number, because the mean of its divisors is an integer number (310941624).

Almost surely, 2^621883247 is an apocalyptic number.

621883247 is a deficient number, since it is larger than the sum of its proper divisors (1).

621883247 is an equidigital number, since it uses as much as digits as its factorization.

621883247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 621883247 is about 24937.5870324296. The cubic root of 621883247 is about 853.5643849471.

The spelling of 621883247 in words is "six hundred twenty-one million, eight hundred eighty-three thousand, two hundred forty-seven".