136551397 has 2 divisors, whose sum is σ = 136551398. Its totient is φ = 136551396.

The previous prime is 136551383. The next prime is 136551409. The reversal of 136551397 is 793155631.

It is a happy number.

136551397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118352641 + 18198756 = 10879^2 + 4266^2 .

It is a cyclic number.

It is not a de Polignac number, because 136551397 - 2¹⁹ = 136027109 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 (136551377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68275698 + 68275699.

It is an arithmetic number, because the mean of its divisors is an integer number (68275699).

Almost surely, 2^136551397 is an apocalyptic number.

It is an amenable number.

136551397 is a deficient number, since it is larger than the sum of its proper divisors (1).

136551397 is an equidigital number, since it uses as much as digits as its factorization.

136551397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 40.

The square root of 136551397 is about 11685.5208270748. The cubic root of 136551397 is about 514.9503794841.

The spelling of 136551397 in words is "one hundred thirty-six million, five hundred fifty-one thousand, three hundred ninety-seven".