136925509 has 16 divisors (see below), whose sum is σ = 164360448. Its totient is φ = 111526272.

The previous prime is 136925507. The next prime is 136925549. The reversal of 136925509 is 905529631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 136925509 - 2¹ = 136925507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136925507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22569 + ... + 27985.

It is an arithmetic number, because the mean of its divisors is an integer number (10272528).

Almost surely, 2^136925509 is an apocalyptic number.

It is an amenable number.

136925509 is a deficient number, since it is larger than the sum of its proper divisors (27434939).

136925509 is a wasteful number, since it uses less digits than its factorization.

136925509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5604.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 136925509 is about 11701.5173802375. The cubic root of 136925509 is about 515.4202232043.

The spelling of 136925509 in words is "one hundred thirty-six million, nine hundred twenty-five thousand, five hundred nine".