137520307 has 2 divisors, whose sum is σ = 137520308. Its totient is φ = 137520306.

The previous prime is 137520281. The next prime is 137520337. The reversal of 137520307 is 703025731.

It is a weak prime.

It is an emirp because it is prime and its reverse (703025731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137520307 - 2⁷ = 137520179 is a prime.

It is not a weakly prime, because it can be changed into another prime (137520337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68760153 + 68760154.

It is an arithmetic number, because the mean of its divisors is an integer number (68760154).

Almost surely, 2^137520307 is an apocalyptic number.

137520307 is a deficient number, since it is larger than the sum of its proper divisors (1).

137520307 is an equidigital number, since it uses as much as digits as its factorization.

137520307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 137520307 is about 11726.9052609800. The cubic root of 137520307 is about 516.1654655832.

The spelling of 137520307 in words is "one hundred thirty-seven million, five hundred twenty thousand, three hundred seven".