111964987 has 2 divisors, whose sum is σ = 111964988. Its totient is φ = 111964986.

The previous prime is 111964961. The next prime is 111964999. The reversal of 111964987 is 789469111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111964987 - 2⁷ = 111964859 is a prime.

It is not a weakly prime, because it can be changed into another prime (111964487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55982493 + 55982494.

It is an arithmetic number, because the mean of its divisors is an integer number (55982494).

Almost surely, 2^111964987 is an apocalyptic number.

111964987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111964987 is an equidigital number, since it uses as much as digits as its factorization.

111964987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 46.

The square root of 111964987 is about 10581.3509061934. The cubic root of 111964987 is about 481.9782176528.

The spelling of 111964987 in words is "one hundred eleven million, nine hundred sixty-four thousand, nine hundred eighty-seven".