137544997 has 2 divisors, whose sum is σ = 137544998. Its totient is φ = 137544996.

The previous prime is 137544973. The next prime is 137545007. The reversal of 137544997 is 799445731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114254721 + 23290276 = 10689^2 + 4826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137544997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137544997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137544907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68772498 + 68772499.

It is an arithmetic number, because the mean of its divisors is an integer number (68772499).

Almost surely, 2^137544997 is an apocalyptic number.

It is an amenable number.

137544997 is a deficient number, since it is larger than the sum of its proper divisors (1).

137544997 is an equidigital number, since it uses as much as digits as its factorization.

137544997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The square root of 137544997 is about 11727.9579211387. The cubic root of 137544997 is about 516.1963540220.

The spelling of 137544997 in words is "one hundred thirty-seven million, five hundred forty-four thousand, nine hundred ninety-seven".