136434387 has 4 divisors (see below), whose sum is σ = 181912520. Its totient is φ = 90956256.

The previous prime is 136434341. The next prime is 136434391. The reversal of 136434387 is 783434631.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 136434387 - 2⁶ = 136434323 is a prime.

It is a super-2 number, since 2×136434387² = 37228683912131538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136434587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22739062 + ... + 22739067.

It is an arithmetic number, because the mean of its divisors is an integer number (45478130).

Almost surely, 2^136434387 is an apocalyptic number.

136434387 is a deficient number, since it is larger than the sum of its proper divisors (45478133).

136434387 is an equidigital number, since it uses as much as digits as its factorization.

136434387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45478132.

The product of its digits is 145152, while the sum is 39.

The square root of 136434387 is about 11680.5131308517. The cubic root of 136434387 is about 514.8032515798.

The spelling of 136434387 in words is "one hundred thirty-six million, four hundred thirty-four thousand, three hundred eighty-seven".