135423749 has 2 divisors, whose sum is σ = 135423750. Its totient is φ = 135423748.

The previous prime is 135423719. The next prime is 135423791. The reversal of 135423749 is 947324531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134908225 + 515524 = 11615^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 135423749 - 2⁸ = 135423493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135423719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67711874 + 67711875.

It is an arithmetic number, because the mean of its divisors is an integer number (67711875).

Almost surely, 2^135423749 is an apocalyptic number.

It is an amenable number.

135423749 is a deficient number, since it is larger than the sum of its proper divisors (1).

135423749 is an equidigital number, since it uses as much as digits as its factorization.

135423749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 38.

The square root of 135423749 is about 11637.1710050166. The cubic root of 135423749 is about 513.5289645746.

The spelling of 135423749 in words is "one hundred thirty-five million, four hundred twenty-three thousand, seven hundred forty-nine".