137273749 has 2 divisors, whose sum is σ = 137273750. Its totient is φ = 137273748.

The previous prime is 137273701. The next prime is 137273753. The reversal of 137273749 is 947372731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116251524 + 21022225 = 10782^2 + 4585^2 .

It is a cyclic number.

It is not a de Polignac number, because 137273749 - 2⁷ = 137273621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137273789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68636874 + 68636875.

It is an arithmetic number, because the mean of its divisors is an integer number (68636875).

Almost surely, 2^137273749 is an apocalyptic number.

It is an amenable number.

137273749 is a deficient number, since it is larger than the sum of its proper divisors (1).

137273749 is an equidigital number, since it uses as much as digits as its factorization.

137273749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 222264, while the sum is 43.

The square root of 137273749 is about 11716.3880526381. The cubic root of 137273749 is about 515.8568060588.

The spelling of 137273749 in words is "one hundred thirty-seven million, two hundred seventy-three thousand, seven hundred forty-nine".