136909144 has 16 divisors (see below), whose sum is σ = 264985920. Its totient is φ = 66246240.

The previous prime is 136909141. The next prime is 136909147. The reversal of 136909144 is 441909631.

It is an interprime number because it is at equal distance from previous prime (136909141) and next prime (136909147).

It is a super-2 number, since 2×136909144² = 37488227421625472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136909141) 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, 275779 + ... + 276274.

It is an arithmetic number, because the mean of its divisors is an integer number (16561620).

Almost surely, 2^136909144 is an apocalyptic number.

It is an amenable number.

136909144 is a deficient number, since it is larger than the sum of its proper divisors (128076776).

136909144 is a wasteful number, since it uses less digits than its factorization.

136909144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552090 (or 552086 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 136909144 is about 11700.8180910567. The cubic root of 136909144 is about 515.3996884671.

The spelling of 136909144 in words is "one hundred thirty-six million, nine hundred nine thousand, one hundred forty-four".