1102639889 has 4 divisors (see below), whose sum is σ = 1187458356. Its totient is φ = 1017821424.

The previous prime is 1102639883. The next prime is 1102639897. The reversal of 1102639889 is 9889362011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9889362011 = 7213 ⋅1371047.

It can be written as a sum of positive squares in 2 ways, for example, as 339775489 + 762864400 = 18433^2 + 27620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1102639889 - 2⁸ = 1102639633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1102639883) 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, 42409214 + ... + 42409239.

It is an arithmetic number, because the mean of its divisors is an integer number (296864589).

Almost surely, 2^1102639889 is an apocalyptic number.

It is an amenable number.

1102639889 is a deficient number, since it is larger than the sum of its proper divisors (84818467).

1102639889 is an equidigital number, since it uses as much as digits as its factorization.

1102639889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84818466.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 1102639889 is about 33206.0218785690. The cubic root of 1102639889 is about 1033.1052451022.

The spelling of 1102639889 in words is "one billion, one hundred two million, six hundred thirty-nine thousand, eight hundred eighty-nine".