1099639939 has 4 divisors (see below), whose sum is σ = 1100170440. Its totient is φ = 1099109440.

The previous prime is 1099639927. The next prime is 1099639949. The reversal of 1099639939 is 9399369901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1099639939 - 2¹³ = 1099631747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099639949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 262129 + ... + 266290.

It is an arithmetic number, because the mean of its divisors is an integer number (275042610).

Almost surely, 2^1099639939 is an apocalyptic number.

1099639939 is a deficient number, since it is larger than the sum of its proper divisors (530501).

1099639939 is an equidigital number, since it uses as much as digits as its factorization.

1099639939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530500.

The product of its (nonzero) digits is 3188646, while the sum is 58.

The square root of 1099639939 is about 33160.8193354748. The cubic root of 1099639939 is about 1032.1674717072.

The spelling of 1099639939 in words is "one billion, ninety-nine million, six hundred thirty-nine thousand, nine hundred thirty-nine".