136539947 has 12 divisors (see below), whose sum is σ = 144978120. Its totient is φ = 128570112.

The previous prime is 136539943. The next prime is 136539959. The reversal of 136539947 is 749935631.

136539947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 136539947 - 2² = 136539943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136539941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63563 + ... + 65675.

It is an arithmetic number, because the mean of its divisors is an integer number (12081510).

Almost surely, 2^136539947 is an apocalyptic number.

136539947 is a deficient number, since it is larger than the sum of its proper divisors (8438173).

136539947 is a wasteful number, since it uses less digits than its factorization.

136539947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330 (or 2311 counting only the distinct ones).

The product of its digits is 612360, while the sum is 47.

The square root of 136539947 is about 11685.0308942681. The cubic root of 136539947 is about 514.9359860108.

The spelling of 136539947 in words is "one hundred thirty-six million, five hundred thirty-nine thousand, nine hundred forty-seven".