137656847 has 4 divisors (see below), whose sum is σ = 140254200. Its totient is φ = 135059496.

The previous prime is 137656829. The next prime is 137656873. The reversal of 137656847 is 748656731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 748656731 = 71 ⋅10544461.

It is a cyclic number.

It is not a de Polignac number, because 137656847 - 2¹⁰ = 137655823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137656807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1298597 + ... + 1298702.

It is an arithmetic number, because the mean of its divisors is an integer number (35063550).

Almost surely, 2^137656847 is an apocalyptic number.

137656847 is a deficient number, since it is larger than the sum of its proper divisors (2597353).

137656847 is an equidigital number, since it uses as much as digits as its factorization.

137656847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2597352.

The product of its digits is 846720, while the sum is 47.

The square root of 137656847 is about 11732.7254719438. The cubic root of 137656847 is about 516.3362377456.

The spelling of 137656847 in words is "one hundred thirty-seven million, six hundred fifty-six thousand, eight hundred forty-seven".