136345287 has 24 divisors (see below), whose sum is σ = 207988816. Its totient is φ = 78962688.

The previous prime is 136345267. The next prime is 136345289. The reversal of 136345287 is 782543631.

It is not a de Polignac number, because 136345287 - 2¹⁴ = 136328903 is a prime.

It is a super-2 number, since 2×136345287² = 37180074574224738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136345289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5223 + ... + 17319.

Almost surely, 2^136345287 is an apocalyptic number.

136345287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

136345287 is a deficient number, since it is larger than the sum of its proper divisors (71643529).

136345287 is a wasteful number, since it uses less digits than its factorization.

136345287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12147 (or 12130 counting only the distinct ones).

The product of its digits is 120960, while the sum is 39.

The square root of 136345287 is about 11676.6984631787. The cubic root of 136345287 is about 514.6911611715.

The spelling of 136345287 in words is "one hundred thirty-six million, three hundred forty-five thousand, two hundred eighty-seven".