6402629 has 2 divisors, whose sum is σ = 6402630. Its totient is φ = 6402628.

The previous prime is 6402619. The next prime is 6402631. The reversal of 6402629 is 9262046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6385729 + 16900 = 2527^2 + 130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6402629 is a prime.

It is a super-2 number, since 2×6402629² = 81987316223282, which contains 22 as substring.

Together with 6402631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6402619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201314 + 3201315.

It is an arithmetic number, because the mean of its divisors is an integer number (3201315).

Almost surely, 2^6402629 is an apocalyptic number.

It is an amenable number.

6402629 is a deficient number, since it is larger than the sum of its proper divisors (1).

6402629 is an equidigital number, since it uses as much as digits as its factorization.

6402629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 6402629 is about 2530.3416765330. The cubic root of 6402629 is about 185.6889722331.

The spelling of 6402629 in words is "six million, four hundred two thousand, six hundred twenty-nine".