247932785137 has 2 divisors, whose sum is σ = 247932785138. Its totient is φ = 247932785136.

The previous prime is 247932785129. The next prime is 247932785167. The reversal of 247932785137 is 731587239742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163667984481 + 84264800656 = 404559^2 + 290284^2 .

It is a cyclic number.

It is not a de Polignac number, because 247932785137 - 2³ = 247932785129 is a prime.

It is a super-2 number, since 2×247932785137² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247932785117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123966392568 + 123966392569.

It is an arithmetic number, because the mean of its divisors is an integer number (123966392569).

Almost surely, 2^247932785137 is an apocalyptic number.

It is an amenable number.

247932785137 is a deficient number, since it is larger than the sum of its proper divisors (1).

247932785137 is an equidigital number, since it uses as much as digits as its factorization.

247932785137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 58.

The spelling of 247932785137 in words is "two hundred forty-seven billion, nine hundred thirty-two million, seven hundred eighty-five thousand, one hundred thirty-seven".