402006659 has 2 divisors, whose sum is σ = 402006660. Its totient is φ = 402006658.

The previous prime is 402006629. The next prime is 402006679. The reversal of 402006659 is 956600204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402006659 - 2¹² = 402002563 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402006629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201003329 + 201003330.

It is an arithmetic number, because the mean of its divisors is an integer number (201003330).

Almost surely, 2^402006659 is an apocalyptic number.

402006659 is a deficient number, since it is larger than the sum of its proper divisors (1).

402006659 is an equidigital number, since it uses as much as digits as its factorization.

402006659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 402006659 is about 20050.1037154425. The cubic root of 402006659 is about 738.0363442759.

The spelling of 402006659 in words is "four hundred two million, six thousand, six hundred fifty-nine".