6398629 has 2 divisors, whose sum is σ = 6398630. Its totient is φ = 6398628.

The previous prime is 6398621. The next prime is 6398633. The reversal of 6398629 is 9268936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5166529 + 1232100 = 2273^2 + 1110^2 .

It is a cyclic number.

It is not a de Polignac number, because 6398629 - 2³ = 6398621 is a prime.

6398629 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6398621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199314 + 3199315.

It is an arithmetic number, because the mean of its divisors is an integer number (3199315).

Almost surely, 2^6398629 is an apocalyptic number.

It is an amenable number.

6398629 is a deficient number, since it is larger than the sum of its proper divisors (1).

6398629 is an equidigital number, since it uses as much as digits as its factorization.

6398629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 6398629 is about 2529.5511459546. The cubic root of 6398629 is about 185.6502948596.

The spelling of 6398629 in words is "six million, three hundred ninety-eight thousand, six hundred twenty-nine".