802031989 has 4 divisors (see below), whose sum is σ = 874944000. Its totient is φ = 729119980.

The previous prime is 802031981. The next prime is 802032053. The reversal of 802031989 is 989130208.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 802031989 - 2³ = 802031981 is a prime.

It is a super-2 number, since 2×802031989² = 1286510622758592242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802031981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36455989 + ... + 36456010.

It is an arithmetic number, because the mean of its divisors is an integer number (218736000).

Almost surely, 2^802031989 is an apocalyptic number.

It is an amenable number.

802031989 is a deficient number, since it is larger than the sum of its proper divisors (72912011).

802031989 is a wasteful number, since it uses less digits than its factorization.

802031989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72912010.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 802031989 is about 28320.1692968104. The cubic root of 802031989 is about 929.1030736621.

The spelling of 802031989 in words is "eight hundred two million, thirty-one thousand, nine hundred eighty-nine".