80870289 has 16 divisors (see below), whose sum is σ = 117166080. Its totient is φ = 49427280.

The previous prime is 80870287. The next prime is 80870291. The reversal of 80870289 is 98207808.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80870287) and next prime (80870291).

It is not a de Polignac number, because 80870289 - 2¹ = 80870287 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80870289.

It is not an unprimeable number, because it can be changed into a prime (80870287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21117 + ... + 24650.

It is an arithmetic number, because the mean of its divisors is an integer number (7322880).

Almost surely, 2^80870289 is an apocalyptic number.

It is an amenable number.

80870289 is a deficient number, since it is larger than the sum of its proper divisors (36295791).

80870289 is a wasteful number, since it uses less digits than its factorization.

80870289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45820.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 80870289 is about 8992.7909460856. The cubic root of 80870289 is about 432.4437901267.

The spelling of 80870289 in words is "eighty million, eight hundred seventy thousand, two hundred eighty-nine".