1100999987 has 2 divisors, whose sum is σ = 1100999988. Its totient is φ = 1100999986.

The previous prime is 1100999983. The next prime is 1100999989. The reversal of 1100999987 is 7899990011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1100999987 - 2² = 1100999983 is a prime.

Together with 1100999989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1100999981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550499993 + 550499994.

It is an arithmetic number, because the mean of its divisors is an integer number (550499994).

Almost surely, 2^1100999987 is an apocalyptic number.

1100999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100999987 is an equidigital number, since it uses as much as digits as its factorization.

1100999987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 53.

The square root of 1100999987 is about 33181.3198501808. The cubic root of 1100999987 is about 1032.5928288048.

The spelling of 1100999987 in words is "one billion, one hundred million, nine hundred ninety-nine thousand, nine hundred eighty-seven".