136404263 has 2 divisors, whose sum is σ = 136404264. Its totient is φ = 136404262.

The previous prime is 136404259. The next prime is 136404341. The reversal of 136404263 is 362404631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 136404263 - 2² = 136404259 is a prime.

It is a super-2 number, since 2×136404263² = 37212245929146338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136401263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68202131 + 68202132.

It is an arithmetic number, because the mean of its divisors is an integer number (68202132).

Almost surely, 2^136404263 is an apocalyptic number.

136404263 is a deficient number, since it is larger than the sum of its proper divisors (1).

136404263 is an equidigital number, since it uses as much as digits as its factorization.

136404263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 136404263 is about 11679.2235615215. The cubic root of 136404263 is about 514.7653601679.

Adding to 136404263 its product of nonzero digits (10368), we get a palindrome (136414631).

Adding to 136404263 its reverse (362404631), we get a palindrome (498808894).

The spelling of 136404263 in words is "one hundred thirty-six million, four hundred four thousand, two hundred sixty-three".