137031247 has 2 divisors, whose sum is σ = 137031248. Its totient is φ = 137031246.

The previous prime is 137031233. The next prime is 137031259. The reversal of 137031247 is 742130731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137031247 - 2²³ = 128642639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137038247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68515623 + 68515624.

It is an arithmetic number, because the mean of its divisors is an integer number (68515624).

Almost surely, 2^137031247 is an apocalyptic number.

137031247 is a deficient number, since it is larger than the sum of its proper divisors (1).

137031247 is an equidigital number, since it uses as much as digits as its factorization.

137031247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 137031247 is about 11706.0346403041. The cubic root of 137031247 is about 515.5528634046.

Adding to 137031247 its reverse (742130731), we get a palindrome (879161978).

The spelling of 137031247 in words is "one hundred thirty-seven million, thirty-one thousand, two hundred forty-seven".