137387849 has 2 divisors, whose sum is σ = 137387850. Its totient is φ = 137387848.

The previous prime is 137387837. The next prime is 137387857. The reversal of 137387849 is 948783731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124657225 + 12730624 = 11165^2 + 3568^2 .

It is a cyclic number.

It is not a de Polignac number, because 137387849 - 2¹⁶ = 137322313 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 137387797 and 137387806.

It is not a weakly prime, because it can be changed into another prime (137387449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68693924 + 68693925.

It is an arithmetic number, because the mean of its divisors is an integer number (68693925).

Almost surely, 2^137387849 is an apocalyptic number.

It is an amenable number.

137387849 is a deficient number, since it is larger than the sum of its proper divisors (1).

137387849 is an equidigital number, since it uses as much as digits as its factorization.

137387849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 137387849 is about 11721.2562893233. The cubic root of 137387849 is about 515.9996907736. Note that the first 3 decimals are identical.

The spelling of 137387849 in words is "one hundred thirty-seven million, three hundred eighty-seven thousand, eight hundred forty-nine".