402044000009 has 2 divisors, whose sum is σ = 402044000010. Its totient is φ = 402044000008.

The previous prime is 402043999993. The next prime is 402044000023. The reversal of 402044000009 is 900000440204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364487497984 + 37556502025 = 603728^2 + 193795^2 .

It is a cyclic number.

It is not a de Polignac number, because 402044000009 - 2⁴ = 402043999993 is a prime.

It is not a weakly prime, because it can be changed into another prime (402044000509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201022000004 + 201022000005.

It is an arithmetic number, because the mean of its divisors is an integer number (201022000005).

Almost surely, 2^402044000009 is an apocalyptic number.

It is an amenable number.

402044000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

402044000009 is an equidigital number, since it uses as much as digits as its factorization.

402044000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The spelling of 402044000009 in words is "four hundred two billion, forty-four million, nine", and thus it is an aban number.