137870687 has 2 divisors, whose sum is σ = 137870688. Its totient is φ = 137870686.

The previous prime is 137870653. The next prime is 137870699. The reversal of 137870687 is 786078731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137870687 - 2¹² = 137866591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137870287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68935343 + 68935344.

It is an arithmetic number, because the mean of its divisors is an integer number (68935344).

Almost surely, 2^137870687 is an apocalyptic number.

137870687 is a deficient number, since it is larger than the sum of its proper divisors (1).

137870687 is an equidigital number, since it uses as much as digits as its factorization.

137870687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 395136, while the sum is 47.

The square root of 137870687 is about 11741.8349077135. The cubic root of 137870687 is about 516.6034631439.

The spelling of 137870687 in words is "one hundred thirty-seven million, eight hundred seventy thousand, six hundred eighty-seven".