136991048 has 8 divisors (see below), whose sum is σ = 256858230. Its totient is φ = 68495520.

The previous prime is 136991039. The next prime is 136991069. The reversal of 136991048 is 840199631.

It can be written as a sum of positive squares in only one way, i.e., 91049764 + 45941284 = 9542^2 + 6778^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 136990996 and 136991014.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8561933 + ... + 8561948.

Almost surely, 2^136991048 is an apocalyptic number.

It is an amenable number.

136991048 is a deficient number, since it is larger than the sum of its proper divisors (119867182).

136991048 is a wasteful number, since it uses less digits than its factorization.

136991048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17123887 (or 17123883 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 136991048 is about 11704.3174939849. The cubic root of 136991048 is about 515.5024448884.

The spelling of 136991048 in words is "one hundred thirty-six million, nine hundred ninety-one thousand, forty-eight".