137668068 has 18 divisors (see below), whose sum is σ = 347994374. Its totient is φ = 45889344.

The previous prime is 137668043. The next prime is 137668073. The reversal of 137668068 is 860866731.

It can be written as a sum of positive squares in only one way, i.e., 133818624 + 3849444 = 11568^2 + 1962^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1912021 + ... + 1912092.

Almost surely, 2^137668068 is an apocalyptic number.

137668068 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

137668068 is an abundant number, since it is smaller than the sum of its proper divisors (210326306).

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

137668068 is a wasteful number, since it uses less digits than its factorization.

137668068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3824123 (or 3824118 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 137668068 is about 11733.2036545864. The cubic root of 137668068 is about 516.3502669582.

The spelling of 137668068 in words is "one hundred thirty-seven million, six hundred sixty-eight thousand, sixty-eight".