137271247 has 2 divisors, whose sum is σ = 137271248. Its totient is φ = 137271246.

The previous prime is 137271227. The next prime is 137271259. The reversal of 137271247 is 742172731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137271247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137271217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68635623 + 68635624.

It is an arithmetic number, because the mean of its divisors is an integer number (68635624).

Almost surely, 2^137271247 is an apocalyptic number.

137271247 is a deficient number, since it is larger than the sum of its proper divisors (1).

137271247 is an equidigital number, since it uses as much as digits as its factorization.

137271247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16464, while the sum is 34.

The square root of 137271247 is about 11716.2812786310. The cubic root of 137271247 is about 515.8536719768.

The spelling of 137271247 in words is "one hundred thirty-seven million, two hundred seventy-one thousand, two hundred forty-seven".