137788723 has 4 divisors (see below), whose sum is σ = 145893960. Its totient is φ = 129683488.

The previous prime is 137788687. The next prime is 137788759. The reversal of 137788723 is 327887731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327887731 = 19 ⋅17257249.

It is an interprime number because it is at equal distance from previous prime (137788687) and next prime (137788759).

It is a cyclic number.

It is not a de Polignac number, because 137788723 - 2²¹ = 135691571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (137785723) 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, 4052593 + ... + 4052626.

It is an arithmetic number, because the mean of its divisors is an integer number (36473490).

Almost surely, 2^137788723 is an apocalyptic number.

137788723 is a deficient number, since it is larger than the sum of its proper divisors (8105237).

137788723 is an equidigital number, since it uses as much as digits as its factorization.

137788723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8105236.

The product of its digits is 395136, while the sum is 46.

The square root of 137788723 is about 11738.3441336502. The cubic root of 137788723 is about 516.5010694181.

It can be divided in two parts, 1377 and 88723, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 137788723 in words is "one hundred thirty-seven million, seven hundred eighty-eight thousand, seven hundred twenty-three".