117438749 has 4 divisors (see below), whose sum is σ = 118335360. Its totient is φ = 116542140.

The previous prime is 117438743. The next prime is 117438751. The reversal of 117438749 is 947834711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 947834711 = 17 ⋅55754983.

It is a cyclic number.

It is not a de Polignac number, because 117438749 - 2⁸ = 117438493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117438743) 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, 448109 + ... + 448370.

It is an arithmetic number, because the mean of its divisors is an integer number (29583840).

Almost surely, 2^117438749 is an apocalyptic number.

It is an amenable number.

117438749 is a deficient number, since it is larger than the sum of its proper divisors (896611).

117438749 is an equidigital number, since it uses as much as digits as its factorization.

117438749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896610.

The product of its digits is 169344, while the sum is 44.

The square root of 117438749 is about 10836.9160280958. The cubic root of 117438749 is about 489.7079322903.

The spelling of 117438749 in words is "one hundred seventeen million, four hundred thirty-eight thousand, seven hundred forty-nine".