117247387 has 4 divisors (see below), whose sum is σ = 118997416. Its totient is φ = 115497360.

The previous prime is 117247373. The next prime is 117247391. The reversal of 117247387 is 783742711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783742711 = 397 ⋅1974163.

It is a cyclic number.

It is not a de Polignac number, because 117247387 - 2¹¹ = 117245339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117247687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874914 + ... + 875047.

It is an arithmetic number, because the mean of its divisors is an integer number (29749354).

Almost surely, 2^117247387 is an apocalyptic number.

117247387 is a deficient number, since it is larger than the sum of its proper divisors (1750029).

117247387 is an equidigital number, since it uses as much as digits as its factorization.

117247387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750028.

The product of its digits is 65856, while the sum is 40.

The square root of 117247387 is about 10828.0832560523. The cubic root of 117247387 is about 489.4418008358.

The spelling of 117247387 in words is "one hundred seventeen million, two hundred forty-seven thousand, three hundred eighty-seven".