111800947 has 2 divisors, whose sum is σ = 111800948. Its totient is φ = 111800946.

The previous prime is 111800893. The next prime is 111800963. The reversal of 111800947 is 749008111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111800947 is a prime.

It is not a weakly prime, because it can be changed into another prime (111800987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55900473 + 55900474.

It is an arithmetic number, because the mean of its divisors is an integer number (55900474).

Almost surely, 2^111800947 is an apocalyptic number.

111800947 is a deficient number, since it is larger than the sum of its proper divisors (1).

111800947 is an equidigital number, since it uses as much as digits as its factorization.

111800947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 111800947 is about 10573.5966917601. The cubic root of 111800947 is about 481.7427203707.

The spelling of 111800947 in words is "one hundred eleven million, eight hundred thousand, nine hundred forty-seven".