137117623 has 4 divisors (see below), whose sum is σ = 144334360. Its totient is φ = 129900888.

The previous prime is 137117609. The next prime is 137117627. The reversal of 137117623 is 326711731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326711731 = 977 ⋅334403.

It is a cyclic number.

It is not a de Polignac number, because 137117623 - 2⁹ = 137117111 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 (137117627) 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, 3608340 + ... + 3608377.

It is an arithmetic number, because the mean of its divisors is an integer number (36083590).

Almost surely, 2^137117623 is an apocalyptic number.

137117623 is a deficient number, since it is larger than the sum of its proper divisors (7216737).

137117623 is an equidigital number, since it uses as much as digits as its factorization.

137117623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7216736.

The product of its digits is 5292, while the sum is 31.

The square root of 137117623 is about 11709.7234382371. The cubic root of 137117623 is about 515.6611648365.

The spelling of 137117623 in words is "one hundred thirty-seven million, one hundred seventeen thousand, six hundred twenty-three".