402444444197 has 2 divisors, whose sum is σ = 402444444198. Its totient is φ = 402444444196.

The previous prime is 402444444179. The next prime is 402444444211. The reversal of 402444444197 is 791444444204.

Together with previous prime (402444444179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400656084676 + 1788359521 = 632974^2 + 42289^2 .

It is a cyclic number.

It is not a de Polignac number, because 402444444197 - 2³⁴ = 385264575013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402444444137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201222222098 + 201222222099.

It is an arithmetic number, because the mean of its divisors is an integer number (201222222099).

Almost surely, 2^402444444197 is an apocalyptic number.

It is an amenable number.

402444444197 is a deficient number, since it is larger than the sum of its proper divisors (1).

402444444197 is an equidigital number, since it uses as much as digits as its factorization.

402444444197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 47.

The spelling of 402444444197 in words is "four hundred two billion, four hundred forty-four million, four hundred forty-four thousand, one hundred ninety-seven".