136779994 has 16 divisors (see below), whose sum is σ = 233950248. Its totient is φ = 59415552.

The previous prime is 136779989. The next prime is 136780051. The reversal of 136779994 is 499977631.

It can be written as a sum of positive squares in 4 ways, for example, as 92064025 + 44715969 = 9595^2 + 6687^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154287 + ... + 155170.

Almost surely, 2^136779994 is an apocalyptic number.

136779994 is a deficient number, since it is larger than the sum of its proper divisors (97170254).

136779994 is a wasteful number, since it uses less digits than its factorization.

136779994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309489.

The product of its digits is 2571912, while the sum is 55.

The square root of 136779994 is about 11695.2979440457. The cubic root of 136779994 is about 515.2375741157.

The spelling of 136779994 in words is "one hundred thirty-six million, seven hundred seventy-nine thousand, nine hundred ninety-four".