1099636987 has 2 divisors, whose sum is σ = 1099636988. Its totient is φ = 1099636986.

The previous prime is 1099636963. The next prime is 1099637009. The reversal of 1099636987 is 7896369901.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1099636987 - 2⁷ = 1099636859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1099636387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549818493 + 549818494.

It is an arithmetic number, because the mean of its divisors is an integer number (549818494).

Almost surely, 2^1099636987 is an apocalyptic number.

1099636987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099636987 is an equidigital number, since it uses as much as digits as its factorization.

1099636987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 58.

The square root of 1099636987 is about 33160.7748250851. The cubic root of 1099636987 is about 1032.1665480833.

The spelling of 1099636987 in words is "one billion, ninety-nine million, six hundred thirty-six thousand, nine hundred eighty-seven".