136423749 has 48 divisors (see below), whose sum is σ = 233041536. Its totient is φ = 69463680.

The previous prime is 136423723. The next prime is 136423789. The reversal of 136423749 is 947324631.

It is not a de Polignac number, because 136423749 - 2⁵ = 136423717 is a prime.

It is a super-2 number, since 2×136423749² = 37222878582430002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136423789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134167 + ... + 135179.

It is an arithmetic number, because the mean of its divisors is an integer number (4855032).

Almost surely, 2^136423749 is an apocalyptic number.

It is an amenable number.

136423749 is a deficient number, since it is larger than the sum of its proper divisors (96617787).

136423749 is a wasteful number, since it uses less digits than its factorization.

136423749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1087 counting only the distinct ones).

The product of its digits is 108864, while the sum is 39.

The square root of 136423749 is about 11680.0577481449. The cubic root of 136423749 is about 514.7898712303.

It can be divided in two parts, 13642 and 3749, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 136423749 in words is "one hundred thirty-six million, four hundred twenty-three thousand, seven hundred forty-nine".