136420859 has 2 divisors, whose sum is σ = 136420860. Its totient is φ = 136420858.

The previous prime is 136420849. The next prime is 136420883. The reversal of 136420859 is 958024631.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136420859 is a prime.

It is a super-2 number, since 2×136420859² = 37221301540595762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136420849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68210429 + 68210430.

It is an arithmetic number, because the mean of its divisors is an integer number (68210430).

Almost surely, 2^136420859 is an apocalyptic number.

136420859 is a deficient number, since it is larger than the sum of its proper divisors (1).

136420859 is an equidigital number, since it uses as much as digits as its factorization.

136420859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 136420859 is about 11679.9340323480. The cubic root of 136420859 is about 514.7862361027.

The spelling of 136420859 in words is "one hundred thirty-six million, four hundred twenty thousand, eight hundred fifty-nine".