136421599 has 2 divisors, whose sum is σ = 136421600. Its totient is φ = 136421598.

The previous prime is 136421573. The next prime is 136421611. The reversal of 136421599 is 995124631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136421599 - 2¹¹ = 136419551 is a prime.

It is a super-2 number, since 2×136421599² = 37221705347433602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136421699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68210799 + 68210800.

It is an arithmetic number, because the mean of its divisors is an integer number (68210800).

Almost surely, 2^136421599 is an apocalyptic number.

136421599 is a deficient number, since it is larger than the sum of its proper divisors (1).

136421599 is an equidigital number, since it uses as much as digits as its factorization.

136421599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 40.

The square root of 136421599 is about 11679.9657105661. The cubic root of 136421599 is about 514.7871669015.

The spelling of 136421599 in words is "one hundred thirty-six million, four hundred twenty-one thousand, five hundred ninety-nine".