402144434309 has 2 divisors, whose sum is σ = 402144434310. Its totient is φ = 402144434308.

The previous prime is 402144434267. The next prime is 402144434339. The reversal of 402144434309 is 903434441204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355308982084 + 46835452225 = 596078^2 + 216415^2 .

It is a cyclic number.

It is not a de Polignac number, because 402144434309 - 2²⁰ = 402143385733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402144434339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201072217154 + 201072217155.

It is an arithmetic number, because the mean of its divisors is an integer number (201072217155).

Almost surely, 2^402144434309 is an apocalyptic number.

It is an amenable number.

402144434309 is a deficient number, since it is larger than the sum of its proper divisors (1).

402144434309 is an equidigital number, since it uses as much as digits as its factorization.

402144434309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 402144434309 in words is "four hundred two billion, one hundred forty-four million, four hundred thirty-four thousand, three hundred nine".