136973680 has 20 divisors (see below), whose sum is σ = 318463992. Its totient is φ = 54789440.

The previous prime is 136973659. The next prime is 136973689. The reversal of 136973680 is 86379631.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136973689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856006 + ... + 856165.

Almost surely, 2^136973680 is an apocalyptic number.

136973680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136973680 is an abundant number, since it is smaller than the sum of its proper divisors (181490312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136973680 is a wasteful number, since it uses less digits than its factorization.

136973680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1712184 (or 1712178 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 136973680 is about 11703.5755220360. The cubic root of 136973680 is about 515.4806584895.

The spelling of 136973680 in words is "one hundred thirty-six million, nine hundred seventy-three thousand, six hundred eighty".