137281913 has 2 divisors, whose sum is σ = 137281914. Its totient is φ = 137281912.

The previous prime is 137281909. The next prime is 137281961. The reversal of 137281913 is 319182731.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97377424 + 39904489 = 9868^2 + 6317^2 .

It is a cyclic number.

It is not a de Polignac number, because 137281913 - 2² = 137281909 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (137281993) 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, 68640956 + 68640957.

It is an arithmetic number, because the mean of its divisors is an integer number (68640957).

Almost surely, 2^137281913 is an apocalyptic number.

It is an amenable number.

137281913 is a deficient number, since it is larger than the sum of its proper divisors (1).

137281913 is an equidigital number, since it uses as much as digits as its factorization.

137281913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 137281913 is about 11716.7364483460. The cubic root of 137281913 is about 515.8670322710.

The spelling of 137281913 in words is "one hundred thirty-seven million, two hundred eighty-one thousand, nine hundred thirteen".