111948817 has 4 divisors (see below), whose sum is σ = 117840880. Its totient is φ = 106056756.

The previous prime is 111948799. The next prime is 111948821. The reversal of 111948817 is 718849111.

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: 718849111 = 31 ⋅23188681.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111948817 is a prime.

It is a super-4 number, since 4×111948817⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111948817.

It is not an unprimeable number, because it can be changed into a prime (111948827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2946003 + ... + 2946040.

It is an arithmetic number, because the mean of its divisors is an integer number (29460220).

Almost surely, 2^111948817 is an apocalyptic number.

It is an amenable number.

111948817 is a deficient number, since it is larger than the sum of its proper divisors (5892063).

111948817 is an equidigital number, since it uses as much as digits as its factorization.

111948817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892062.

The product of its digits is 16128, while the sum is 40.

The square root of 111948817 is about 10580.5867984720. The cubic root of 111948817 is about 481.9550140806.

The spelling of 111948817 in words is "one hundred eleven million, nine hundred forty-eight thousand, eight hundred seventeen".