137305715 has 4 divisors (see below), whose sum is σ = 164766864. Its totient is φ = 109844568.

The previous prime is 137305703. The next prime is 137305747. The reversal of 137305715 is 517503731.

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 137305715 - 2¹⁰ = 137304691 is a prime.

It is a super-2 number, since 2×137305715² = 37705718743322450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13730567 + ... + 13730576.

It is an arithmetic number, because the mean of its divisors is an integer number (41191716).

Almost surely, 2^137305715 is an apocalyptic number.

137305715 is a deficient number, since it is larger than the sum of its proper divisors (27461149).

137305715 is an equidigital number, since it uses as much as digits as its factorization.

137305715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27461148.

The product of its (nonzero) digits is 11025, while the sum is 32.

The square root of 137305715 is about 11717.7521308483. The cubic root of 137305715 is about 515.8968443011.

The spelling of 137305715 in words is "one hundred thirty-seven million, three hundred five thousand, seven hundred fifteen".