136863988 has 6 divisors (see below), whose sum is σ = 239511986. Its totient is φ = 68431992.

The previous prime is 136863983. The next prime is 136864001. The reversal of 136863988 is 889368631.

It can be written as a sum of positive squares in only one way, i.e., 124947684 + 11916304 = 11178^2 + 3452^2 .

It is a super-2 number, since 2×136863988² = 37463502422528288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136863983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17107995 + ... + 17108002.

Almost surely, 2^136863988 is an apocalyptic number.

It is an amenable number.

136863988 is a deficient number, since it is larger than the sum of its proper divisors (102647998).

136863988 is a wasteful number, since it uses less digits than its factorization.

136863988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34216001 (or 34215999 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 52.

The square root of 136863988 is about 11698.8883232553. Note that the first 3 decimals coincide. The cubic root of 136863988 is about 515.3430184088.

It can be divided in two parts, 1368 and 63988, that added together give a palindrome (65356).

The spelling of 136863988 in words is "one hundred thirty-six million, eight hundred sixty-three thousand, nine hundred eighty-eight".