136409423 has 2 divisors, whose sum is σ = 136409424. Its totient is φ = 136409422.

The previous prime is 136409401. The next prime is 136409431. The reversal of 136409423 is 324904631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136409423 - 2¹⁰ = 136408399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136409423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136409453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68204711 + 68204712.

It is an arithmetic number, because the mean of its divisors is an integer number (68204712).

Almost surely, 2^136409423 is an apocalyptic number.

136409423 is a deficient number, since it is larger than the sum of its proper divisors (1).

136409423 is an equidigital number, since it uses as much as digits as its factorization.

136409423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 136409423 is about 11679.4444645283. Note that the first 4 decimals coincide. The cubic root of 136409423 is about 514.7718510593.

The spelling of 136409423 in words is "one hundred thirty-six million, four hundred nine thousand, four hundred twenty-three".