137139449 has 2 divisors, whose sum is σ = 137139450. Its totient is φ = 137139448.

The previous prime is 137139413. The next prime is 137139469. The reversal of 137139449 is 944931731.

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., 135303424 + 1836025 = 11632^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 137139449 - 2¹² = 137135353 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (137139469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68569724 + 68569725.

It is an arithmetic number, because the mean of its divisors is an integer number (68569725).

Almost surely, 2^137139449 is an apocalyptic number.

It is an amenable number.

137139449 is a deficient number, since it is larger than the sum of its proper divisors (1).

137139449 is an equidigital number, since it uses as much as digits as its factorization.

137139449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 137139449 is about 11710.6553616781. The cubic root of 137139449 is about 515.6885238859.

The spelling of 137139449 in words is "one hundred thirty-seven million, one hundred thirty-nine thousand, four hundred forty-nine".