137561647 has 2 divisors, whose sum is σ = 137561648. Its totient is φ = 137561646.

The previous prime is 137561639. The next prime is 137561651. The reversal of 137561647 is 746165731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137561647 - 2³ = 137561639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137561657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68780823 + 68780824.

It is an arithmetic number, because the mean of its divisors is an integer number (68780824).

Almost surely, 2^137561647 is an apocalyptic number.

137561647 is a deficient number, since it is larger than the sum of its proper divisors (1).

137561647 is an equidigital number, since it uses as much as digits as its factorization.

137561647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 137561647 is about 11728.6677419049. The cubic root of 137561647 is about 516.2171819273.

The spelling of 137561647 in words is "one hundred thirty-seven million, five hundred sixty-one thousand, six hundred forty-seven".