136839751 has 2 divisors, whose sum is σ = 136839752. Its totient is φ = 136839750.

The previous prime is 136839721. The next prime is 136839779. The reversal of 136839751 is 157938631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136839751 - 2¹¹ = 136837703 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136839698 and 136839707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136839721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68419875 + 68419876.

It is an arithmetic number, because the mean of its divisors is an integer number (68419876).

Almost surely, 2^136839751 is an apocalyptic number.

136839751 is a deficient number, since it is larger than the sum of its proper divisors (1).

136839751 is an equidigital number, since it uses as much as digits as its factorization.

136839751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 136839751 is about 11697.8524097374. The cubic root of 136839751 is about 515.3125962203.

The spelling of 136839751 in words is "one hundred thirty-six million, eight hundred thirty-nine thousand, seven hundred fifty-one".