136391849 has 8 divisors (see below), whose sum is σ = 149273280. Its totient is φ = 123590800.

The previous prime is 136391839. The next prime is 136391873. The reversal of 136391849 is 948193631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136391849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136391819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16514 + ... + 23355.

It is an arithmetic number, because the mean of its divisors is an integer number (18659160).

Almost surely, 2^136391849 is an apocalyptic number.

It is an amenable number.

136391849 is a deficient number, since it is larger than the sum of its proper divisors (12881431).

136391849 is a wasteful number, since it uses less digits than its factorization.

136391849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40191.

The product of its digits is 139968, while the sum is 44.

The square root of 136391849 is about 11678.6920928672. The cubic root of 136391849 is about 514.7497436202.

The spelling of 136391849 in words is "one hundred thirty-six million, three hundred ninety-one thousand, eight hundred forty-nine".