137439393 has 16 divisors (see below), whose sum is σ = 225542016. Its totient is φ = 72495360.

The previous prime is 137439391. The next prime is 137439403. The reversal of 137439393 is 393934731.

It is not a de Polignac number, because 137439393 - 2¹ = 137439391 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (137439391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251448 + ... + 251993.

It is an arithmetic number, because the mean of its divisors is an integer number (14096376).

Almost surely, 2^137439393 is an apocalyptic number.

137439393 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

137439393 is a deficient number, since it is larger than the sum of its proper divisors (88102623).

137439393 is a wasteful number, since it uses less digits than its factorization.

137439393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503464.

The product of its digits is 183708, while the sum is 42.

The square root of 137439393 is about 11723.4548235578. The cubic root of 137439393 is about 516.0642121580.

The spelling of 137439393 in words is "one hundred thirty-seven million, four hundred thirty-nine thousand, three hundred ninety-three".