137758913 has 2 divisors, whose sum is σ = 137758914. Its totient is φ = 137758912.

The previous prime is 137758909. The next prime is 137758967. The reversal of 137758913 is 319857731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135303424 + 2455489 = 11632^2 + 1567^2 .

It is a cyclic number.

It is not a de Polignac number, because 137758913 - 2² = 137758909 is a prime.

It is a super-2 number, since 2×137758913² = 37955036221883138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (137758013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68879456 + 68879457.

It is an arithmetic number, because the mean of its divisors is an integer number (68879457).

Almost surely, 2^137758913 is an apocalyptic number.

It is an amenable number.

137758913 is a deficient number, since it is larger than the sum of its proper divisors (1).

137758913 is an equidigital number, since it uses as much as digits as its factorization.

137758913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 44.

The square root of 137758913 is about 11737.0742947295. The cubic root of 137758913 is about 516.4638191337.

The spelling of 137758913 in words is "one hundred thirty-seven million, seven hundred fifty-eight thousand, nine hundred thirteen".