137521039 has 4 divisors (see below), whose sum is σ = 137700640. Its totient is φ = 137341440.

The previous prime is 137521037. The next prime is 137521063. The reversal of 137521039 is 930125731.

137521039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 137521039 - 2¹ = 137521037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 137521039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137521037) 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, 88647 + ... + 90184.

It is an arithmetic number, because the mean of its divisors is an integer number (34425160).

Almost surely, 2^137521039 is an apocalyptic number.

137521039 is a deficient number, since it is larger than the sum of its proper divisors (179601).

137521039 is an equidigital number, since it uses as much as digits as its factorization.

137521039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179600.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 137521039 is about 11726.9364712187. The cubic root of 137521039 is about 516.1663814054.

The spelling of 137521039 in words is "one hundred thirty-seven million, five hundred twenty-one thousand, thirty-nine".