136491149 has 4 divisors (see below), whose sum is σ = 139395264. Its totient is φ = 133587036.

The previous prime is 136491119. The next prime is 136491161. The reversal of 136491149 is 941194631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 136491149 - 2¹² = 136487053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136491119) 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, 1451987 + ... + 1452080.

It is an arithmetic number, because the mean of its divisors is an integer number (34848816).

Almost surely, 2^136491149 is an apocalyptic number.

It is an amenable number.

136491149 is a deficient number, since it is larger than the sum of its proper divisors (2904115).

136491149 is an equidigital number, since it uses as much as digits as its factorization.

136491149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2904114.

The product of its digits is 23328, while the sum is 38.

The square root of 136491149 is about 11682.9426515754. The cubic root of 136491149 is about 514.8746343921.

The spelling of 136491149 in words is "one hundred thirty-six million, four hundred ninety-one thousand, one hundred forty-nine".