111799817 has 2 divisors, whose sum is σ = 111799818. Its totient is φ = 111799816.

The previous prime is 111799789. The next prime is 111799873. The reversal of 111799817 is 718997111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74149321 + 37650496 = 8611^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 111799817 - 2¹² = 111795721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111799217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55899908 + 55899909.

It is an arithmetic number, because the mean of its divisors is an integer number (55899909).

Almost surely, 2^111799817 is an apocalyptic number.

It is an amenable number.

111799817 is a deficient number, since it is larger than the sum of its proper divisors (1).

111799817 is an equidigital number, since it uses as much as digits as its factorization.

111799817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 44.

The square root of 111799817 is about 10573.5432566382. The cubic root of 111799817 is about 481.7410973341.

The spelling of 111799817 in words is "one hundred eleven million, seven hundred ninety-nine thousand, eight hundred seventeen".