402309799 has 2 divisors, whose sum is σ = 402309800. Its totient is φ = 402309798.

The previous prime is 402309793. The next prime is 402309821. The reversal of 402309799 is 997903204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 402309799 - 2¹¹ = 402307751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402309793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201154899 + 201154900.

It is an arithmetic number, because the mean of its divisors is an integer number (201154900).

Almost surely, 2^402309799 is an apocalyptic number.

402309799 is a deficient number, since it is larger than the sum of its proper divisors (1).

402309799 is an equidigital number, since it uses as much as digits as its factorization.

402309799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 402309799 is about 20057.6618527684. The cubic root of 402309799 is about 738.2218073112.

The spelling of 402309799 in words is "four hundred two million, three hundred nine thousand, seven hundred ninety-nine".