137769449 has 2 divisors, whose sum is σ = 137769450. Its totient is φ = 137769448.

The previous prime is 137769431. The next prime is 137769461. The reversal of 137769449 is 944967731.

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., 123654400 + 14115049 = 11120^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 137769449 - 2²⁴ = 120992233 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 137769397 and 137769406.

It is not a weakly prime, because it can be changed into another prime (137760449) 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, 68884724 + 68884725.

It is an arithmetic number, because the mean of its divisors is an integer number (68884725).

Almost surely, 2^137769449 is an apocalyptic number.

It is an amenable number.

137769449 is a deficient number, since it is larger than the sum of its proper divisors (1).

137769449 is an equidigital number, since it uses as much as digits as its factorization.

137769449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 50.

The square root of 137769449 is about 11737.5231203180. The cubic root of 137769449 is about 516.4769854302.

The spelling of 137769449 in words is "one hundred thirty-seven million, seven hundred sixty-nine thousand, four hundred forty-nine".