402791531189 has 2 divisors, whose sum is σ = 402791531190. Its totient is φ = 402791531188.

The previous prime is 402791531159. The next prime is 402791531209. The reversal of 402791531189 is 981135197204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242671508689 + 160120022500 = 492617^2 + 400150^2 .

It is a cyclic number.

It is not a de Polignac number, because 402791531189 - 2¹⁶ = 402791465653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402791531159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201395765594 + 201395765595.

It is an arithmetic number, because the mean of its divisors is an integer number (201395765595).

Almost surely, 2^402791531189 is an apocalyptic number.

It is an amenable number.

402791531189 is a deficient number, since it is larger than the sum of its proper divisors (1).

402791531189 is an equidigital number, since it uses as much as digits as its factorization.

402791531189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 50.

The spelling of 402791531189 in words is "four hundred two billion, seven hundred ninety-one million, five hundred thirty-one thousand, one hundred eighty-nine".