137628949 has 2 divisors, whose sum is σ = 137628950. Its totient is φ = 137628948.

The previous prime is 137628947. The next prime is 137628971. The reversal of 137628949 is 949826731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115132900 + 22496049 = 10730^2 + 4743^2 .

It is a cyclic number.

It is not a de Polignac number, because 137628949 - 2¹ = 137628947 is a prime.

Together with 137628947, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137628947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68814474 + 68814475.

It is an arithmetic number, because the mean of its divisors is an integer number (68814475).

Almost surely, 2^137628949 is an apocalyptic number.

It is an amenable number.

137628949 is a deficient number, since it is larger than the sum of its proper divisors (1).

137628949 is an equidigital number, since it uses as much as digits as its factorization.

137628949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 137628949 is about 11731.5365148816. The cubic root of 137628949 is about 516.3013545756.

The spelling of 137628949 in words is "one hundred thirty-seven million, six hundred twenty-eight thousand, nine hundred forty-nine".