137740727 has 4 divisors (see below), whose sum is σ = 138264720. Its totient is φ = 137216736.

The previous prime is 137740717. The next prime is 137740753. The reversal of 137740727 is 727047731.

It is a happy number.

137740727 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, and also an emirpimes, since its reverse is a distinct semiprime: 727047731 = 13121 ⋅55411.

It is a cyclic number.

It is not a de Polignac number, because 137740727 - 2⁴ = 137740711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137740717) 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, 261602 + ... + 262127.

It is an arithmetic number, because the mean of its divisors is an integer number (34566180).

Almost surely, 2^137740727 is an apocalyptic number.

137740727 is a deficient number, since it is larger than the sum of its proper divisors (523993).

137740727 is an equidigital number, since it uses as much as digits as its factorization.

137740727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523992.

The product of its (nonzero) digits is 57624, while the sum is 38.

The square root of 137740727 is about 11736.2995445754. The cubic root of 137740727 is about 516.4410914467.

The spelling of 137740727 in words is "one hundred thirty-seven million, seven hundred forty thousand, seven hundred twenty-seven".