1139854989 has 32 divisors (see below), whose sum is σ = 1872509184. Its totient is φ = 600606720.

The previous prime is 1139854979. The next prime is 1139855009. The reversal of 1139854989 is 9894589311.

It is not a de Polignac number, because 1139854989 - 2⁸ = 1139854733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139854909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373309 + ... + 376349.

It is an arithmetic number, because the mean of its divisors is an integer number (58515912).

Almost surely, 2^1139854989 is an apocalyptic number.

It is an amenable number.

1139854989 is a deficient number, since it is larger than the sum of its proper divisors (732654195).

1139854989 is a wasteful number, since it uses less digits than its factorization.

1139854989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4437.

The product of its digits is 2799360, while the sum is 57.

The square root of 1139854989 is about 33761.7385363965. The cubic root of 1139854989 is about 1044.5996311252.

The spelling of 1139854989 in words is "one billion, one hundred thirty-nine million, eight hundred fifty-four thousand, nine hundred eighty-nine".