400202323189 has 2 divisors, whose sum is σ = 400202323190. Its totient is φ = 400202323188.

The previous prime is 400202323187. The next prime is 400202323229. The reversal of 400202323189 is 981323202004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216255691089 + 183946632100 = 465033^2 + 428890^2 .

It is a cyclic number.

It is not a de Polignac number, because 400202323189 - 2¹ = 400202323187 is a prime.

Together with 400202323187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400202323187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200101161594 + 200101161595.

It is an arithmetic number, because the mean of its divisors is an integer number (200101161595).

Almost surely, 2^400202323189 is an apocalyptic number.

It is an amenable number.

400202323189 is a deficient number, since it is larger than the sum of its proper divisors (1).

400202323189 is an equidigital number, since it uses as much as digits as its factorization.

400202323189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 400202323189 in words is "four hundred billion, two hundred two million, three hundred twenty-three thousand, one hundred eighty-nine".