111442987 has 2 divisors, whose sum is σ = 111442988. Its totient is φ = 111442986.

The previous prime is 111442963. The next prime is 111443023. The reversal of 111442987 is 789244111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111442987 - 2²³ = 103054379 is a prime.

It is not a weakly prime, because it can be changed into another prime (111442907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55721493 + 55721494.

It is an arithmetic number, because the mean of its divisors is an integer number (55721494).

Almost surely, 2^111442987 is an apocalyptic number.

111442987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111442987 is an equidigital number, since it uses as much as digits as its factorization.

111442987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 37.

The square root of 111442987 is about 10556.6560519892. The cubic root of 111442987 is about 481.2280288614.

The spelling of 111442987 in words is "one hundred eleven million, four hundred forty-two thousand, nine hundred eighty-seven".