136876909 has 8 divisors (see below), whose sum is σ = 147537432. Its totient is φ = 126235200.

The previous prime is 136876879. The next prime is 136876921. The reversal of 136876909 is 909678631.

It can be written as a sum of positive squares in 4 ways, for example, as 5774409 + 131102500 = 2403^2 + 11450^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-136876909 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 (136876709) 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, 12867 + ... + 20959.

It is an arithmetic number, because the mean of its divisors is an integer number (18442179).

Almost surely, 2^136876909 is an apocalyptic number.

It is an amenable number.

136876909 is a deficient number, since it is larger than the sum of its proper divisors (10660523).

136876909 is a wasteful number, since it uses less digits than its factorization.

136876909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9407.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 136876909 is about 11699.4405421798. The cubic root of 136876909 is about 515.3592353302.

The spelling of 136876909 in words is "one hundred thirty-six million, eight hundred seventy-six thousand, nine hundred nine".