187901025797 has 2 divisors, whose sum is σ = 187901025798. Its totient is φ = 187901025796.

The previous prime is 187901025773. The next prime is 187901025817. The reversal of 187901025797 is 797520109781.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183538555396 + 4362470401 = 428414^2 + 66049^2 .

It is a cyclic number.

It is not a de Polignac number, because 187901025797 - 2⁶ = 187901025733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (187901025397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93950512898 + 93950512899.

It is an arithmetic number, because the mean of its divisors is an integer number (93950512899).

Almost surely, 2^187901025797 is an apocalyptic number.

It is an amenable number.

187901025797 is a deficient number, since it is larger than the sum of its proper divisors (1).

187901025797 is an equidigital number, since it uses as much as digits as its factorization.

187901025797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2222640, while the sum is 56.

The spelling of 187901025797 in words is "one hundred eighty-seven billion, nine hundred one million, twenty-five thousand, seven hundred ninety-seven".