136779885 has 24 divisors (see below), whose sum is σ = 258639264. Its totient is φ = 66317280.

The previous prime is 136779757. The next prime is 136779899. The reversal of 136779885 is 588977631.

It is not a de Polignac number, because 136779885 - 2⁷ = 136779757 is a prime.

It is a super-2 number, since 2×136779885² = 37417473881226450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 137667 + ... + 138656.

It is an arithmetic number, because the mean of its divisors is an integer number (10776636).

Almost surely, 2^136779885 is an apocalyptic number.

136779885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

136779885 is a deficient number, since it is larger than the sum of its proper divisors (121859379).

136779885 is a wasteful number, since it uses less digits than its factorization.

136779885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276345 (or 276342 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 136779885 is about 11695.2932840523. The cubic root of 136779885 is about 515.2374372514.

The spelling of 136779885 in words is "one hundred thirty-six million, seven hundred seventy-nine thousand, eight hundred eighty-five".