111780997 has 8 divisors (see below), whose sum is σ = 113349600. Its totient is φ = 110217840.

The previous prime is 111780983. The next prime is 111781027. The reversal of 111780997 is 799087111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111780997 - 2¹¹ = 111778949 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 (111784997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56379 + ... + 58327.

It is an arithmetic number, because the mean of its divisors is an integer number (14168700).

Almost surely, 2^111780997 is an apocalyptic number.

It is an amenable number.

111780997 is a deficient number, since it is larger than the sum of its proper divisors (1568603).

111780997 is an equidigital number, since it uses as much as digits as its factorization.

111780997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2723.

The product of its (nonzero) digits is 31752, while the sum is 43.

The square root of 111780997 is about 10572.6532620719. The cubic root of 111780997 is about 481.7140642659.

The spelling of 111780997 in words is "one hundred eleven million, seven hundred eighty thousand, nine hundred ninety-seven".