137287823 has 4 divisors (see below), whose sum is σ = 137650440. Its totient is φ = 136925208.

The previous prime is 137287817. The next prime is 137287849. The reversal of 137287823 is 328782731.

137287823 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: 328782731 = 41 ⋅8019091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137287823 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 (137287853) 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, 180740 + ... + 181497.

It is an arithmetic number, because the mean of its divisors is an integer number (34412610).

Almost surely, 2^137287823 is an apocalyptic number.

137287823 is a deficient number, since it is larger than the sum of its proper divisors (362617).

137287823 is an equidigital number, since it uses as much as digits as its factorization.

137287823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362616.

The product of its digits is 112896, while the sum is 41.

The square root of 137287823 is about 11716.9886489661. The cubic root of 137287823 is about 515.8744348738.

The spelling of 137287823 in words is "one hundred thirty-seven million, two hundred eighty-seven thousand, eight hundred twenty-three".