137645423 has 4 divisors (see below), whose sum is σ = 137714208. Its totient is φ = 137576640.

The previous prime is 137645419. The next prime is 137645429. The reversal of 137645423 is 324546731.

137645423 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: 324546731 = 1523 ⋅213097.

It is a cyclic number.

It is not a de Polignac number, because 137645423 - 2² = 137645419 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 (137645429) 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, 31298 + ... + 35423.

It is an arithmetic number, because the mean of its divisors is an integer number (34428552).

Almost surely, 2^137645423 is an apocalyptic number.

137645423 is a deficient number, since it is larger than the sum of its proper divisors (68785).

137645423 is an equidigital number, since it uses as much as digits as its factorization.

137645423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68784.

The product of its digits is 60480, while the sum is 35.

The square root of 137645423 is about 11732.2386184394. The cubic root of 137645423 is about 516.3219539462.

The spelling of 137645423 in words is "one hundred thirty-seven million, six hundred forty-five thousand, four hundred twenty-three".