137697647 has 2 divisors, whose sum is σ = 137697648. Its totient is φ = 137697646.

The previous prime is 137697559. The next prime is 137697649. The reversal of 137697647 is 746796731.

It is a happy number.

137697647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137697647 - 2¹⁴ = 137681263 is a prime.

Together with 137697649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 137697595 and 137697604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137697649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68848823 + 68848824.

It is an arithmetic number, because the mean of its divisors is an integer number (68848824).

Almost surely, 2^137697647 is an apocalyptic number.

137697647 is a deficient number, since it is larger than the sum of its proper divisors (1).

137697647 is an equidigital number, since it uses as much as digits as its factorization.

137697647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 50.

The square root of 137697647 is about 11734.4640695688. The cubic root of 137697647 is about 516.3872448646.

The spelling of 137697647 in words is "one hundred thirty-seven million, six hundred ninety-seven thousand, six hundred forty-seven".