137288239 has 4 divisors (see below), whose sum is σ = 149769000. Its totient is φ = 124807480.

The previous prime is 137288237. The next prime is 137288257. The reversal of 137288239 is 932882731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 137288239 - 2¹ = 137288237 is a prime.

It is a super-2 number, since 2×137288239² = 37696121135442242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 137288195 and 137288204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137288231) 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, 6240364 + ... + 6240385.

It is an arithmetic number, because the mean of its divisors is an integer number (37442250).

Almost surely, 2^137288239 is an apocalyptic number.

137288239 is a deficient number, since it is larger than the sum of its proper divisors (12480761).

137288239 is a wasteful number, since it uses less digits than its factorization.

137288239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12480760.

The product of its digits is 145152, while the sum is 43.

The square root of 137288239 is about 11717.0064009541. The cubic root of 137288239 is about 515.8749559289.

The spelling of 137288239 in words is "one hundred thirty-seven million, two hundred eighty-eight thousand, two hundred thirty-nine".