291401630189 has 2 divisors, whose sum is σ = 291401630190. Its totient is φ = 291401630188.

The previous prime is 291401630183. The next prime is 291401630203. The reversal of 291401630189 is 981036104192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230520015625 + 60881614564 = 480125^2 + 246742^2 .

It is a cyclic number.

It is not a de Polignac number, because 291401630189 - 2¹² = 291401626093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (291401630183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145700815094 + 145700815095.

It is an arithmetic number, because the mean of its divisors is an integer number (145700815095).

Almost surely, 2^291401630189 is an apocalyptic number.

It is an amenable number.

291401630189 is a deficient number, since it is larger than the sum of its proper divisors (1).

291401630189 is an equidigital number, since it uses as much as digits as its factorization.

291401630189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 291401630189 in words is "two hundred ninety-one billion, four hundred one million, six hundred thirty thousand, one hundred eighty-nine".