80863989 has 4 divisors (see below), whose sum is σ = 107818656. Its totient is φ = 53909324.

The previous prime is 80863987. The next prime is 80863997. The reversal of 80863989 is 98936808.

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 80863989 - 2¹ = 80863987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80863987) 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, 13477329 + ... + 13477334.

It is an arithmetic number, because the mean of its divisors is an integer number (26954664).

Almost surely, 2^80863989 is an apocalyptic number.

It is an amenable number.

80863989 is a deficient number, since it is larger than the sum of its proper divisors (26954667).

80863989 is a wasteful number, since it uses less digits than its factorization.

80863989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26954666.

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 80863989 is about 8992.4406586866. The cubic root of 80863989 is about 432.4325603468.

The spelling of 80863989 in words is "eighty million, eight hundred sixty-three thousand, nine hundred eighty-nine".