136703978 has 4 divisors (see below), whose sum is σ = 205055970. Its totient is φ = 68351988.

The previous prime is 136703977. The next prime is 136704047. The reversal of 136703978 is 879307631.

136703978 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 136352329 + 351649 = 11677^2 + 593^2 .

It is not an unprimeable number, because it can be changed into a prime (136703977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34175993 + ... + 34175996.

Almost surely, 2^136703978 is an apocalyptic number.

136703978 is a deficient number, since it is larger than the sum of its proper divisors (68351992).

136703978 is an equidigital number, since it uses as much as digits as its factorization.

136703978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68351991.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 136703978 is about 11692.0476393145. The cubic root of 136703978 is about 515.1421080169.

The spelling of 136703978 in words is "one hundred thirty-six million, seven hundred three thousand, nine hundred seventy-eight".