136121423 has 2 divisors, whose sum is σ = 136121424. Its totient is φ = 136121422.

The previous prime is 136121369. The next prime is 136121443. The reversal of 136121423 is 324121631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 136121423 - 2¹² = 136117327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136121443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68060711 + 68060712.

It is an arithmetic number, because the mean of its divisors is an integer number (68060712).

Almost surely, 2^136121423 is an apocalyptic number.

136121423 is a deficient number, since it is larger than the sum of its proper divisors (1).

136121423 is an equidigital number, since it uses as much as digits as its factorization.

136121423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 136121423 is about 11667.1085963918. The cubic root of 136121423 is about 514.4093180603.

The spelling of 136121423 in words is "one hundred thirty-six million, one hundred twenty-one thousand, four hundred twenty-three".