197484139637 has 2 divisors, whose sum is σ = 197484139638. Its totient is φ = 197484139636.

The previous prime is 197484139583. The next prime is 197484139661. The reversal of 197484139637 is 736931484791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181028124676 + 16456014961 = 425474^2 + 128281^2 .

It is a cyclic number.

It is not a de Polignac number, because 197484139637 - 2²⁶ = 197417030773 is a prime.

It is a super-2 number, since 2×197484139637² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 197484139637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197484136637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98742069818 + 98742069819.

It is an arithmetic number, because the mean of its divisors is an integer number (98742069819).

Almost surely, 2^197484139637 is an apocalyptic number.

It is an amenable number.

197484139637 is a deficient number, since it is larger than the sum of its proper divisors (1).

197484139637 is an equidigital number, since it uses as much as digits as its factorization.

197484139637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 62.

The spelling of 197484139637 in words is "one hundred ninety-seven billion, four hundred eighty-four million, one hundred thirty-nine thousand, six hundred thirty-seven".