136187731 has 8 divisors (see below), whose sum is σ = 145301904. Its totient is φ = 127196160.

The previous prime is 136187719. The next prime is 136187747. The reversal of 136187731 is 137781631.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136187731 - 2⁵ = 136187699 is a prime.

It is a super-2 number, since 2×136187731² = 37094196149856722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136187771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28350 + ... + 32803.

It is an arithmetic number, because the mean of its divisors is an integer number (18162738).

Almost surely, 2^136187731 is an apocalyptic number.

136187731 is a deficient number, since it is larger than the sum of its proper divisors (9114173).

136187731 is a wasteful number, since it uses less digits than its factorization.

136187731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61301.

The product of its digits is 21168, while the sum is 37.

The square root of 136187731 is about 11669.9499142027. The cubic root of 136187731 is about 514.4928315277.

The spelling of 136187731 in words is "one hundred thirty-six million, one hundred eighty-seven thousand, seven hundred thirty-one".