621476899 has 2 divisors, whose sum is σ = 621476900. Its totient is φ = 621476898.

The previous prime is 621476879. The next prime is 621476927. The reversal of 621476899 is 998674126.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-621476899 is a prime.

It is not a weakly prime, because it can be changed into another prime (621476839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310738449 + 310738450.

It is an arithmetic number, because the mean of its divisors is an integer number (310738450).

Almost surely, 2^621476899 is an apocalyptic number.

621476899 is a deficient number, since it is larger than the sum of its proper divisors (1).

621476899 is an equidigital number, since it uses as much as digits as its factorization.

621476899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 621476899 is about 24929.4384012155. The cubic root of 621476899 is about 853.3784337769.

The spelling of 621476899 in words is "six hundred twenty-one million, four hundred seventy-six thousand, eight hundred ninety-nine".