136851797 has 2 divisors, whose sum is σ = 136851798. Its totient is φ = 136851796.

The previous prime is 136851791. The next prime is 136851821. The reversal of 136851797 is 797158631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81884401 + 54967396 = 9049^2 + 7414^2 .

It is a cyclic number.

It is not a de Polignac number, because 136851797 - 2¹⁶ = 136786261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136851791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68425898 + 68425899.

It is an arithmetic number, because the mean of its divisors is an integer number (68425899).

Almost surely, 2^136851797 is an apocalyptic number.

It is an amenable number.

136851797 is a deficient number, since it is larger than the sum of its proper divisors (1).

136851797 is an equidigital number, since it uses as much as digits as its factorization.

136851797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 47.

The square root of 136851797 is about 11698.3672792403. The cubic root of 136851797 is about 515.3277167618.

The spelling of 136851797 in words is "one hundred thirty-six million, eight hundred fifty-one thousand, seven hundred ninety-seven".