137648437 has 2 divisors, whose sum is σ = 137648438. Its totient is φ = 137648436.

The previous prime is 137648417. The next prime is 137648449. The reversal of 137648437 is 734846731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123854641 + 13793796 = 11129^2 + 3714^2 .

It is a cyclic number.

It is not a de Polignac number, because 137648437 - 2¹⁵ = 137615669 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137648393 and 137648402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137648417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68824218 + 68824219.

It is an arithmetic number, because the mean of its divisors is an integer number (68824219).

Almost surely, 2^137648437 is an apocalyptic number.

It is an amenable number.

137648437 is a deficient number, since it is larger than the sum of its proper divisors (1).

137648437 is an equidigital number, since it uses as much as digits as its factorization.

137648437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 43.

The square root of 137648437 is about 11732.3670672205. The cubic root of 137648437 is about 516.3257225254.

It can be divided in two parts, 13764 and 8437, that added together give a square (22201 = 149²).

The spelling of 137648437 in words is "one hundred thirty-seven million, six hundred forty-eight thousand, four hundred thirty-seven".