80880869 has 2 divisors, whose sum is σ = 80880870. Its totient is φ = 80880868.

The previous prime is 80880851. The next prime is 80880871. The reversal of 80880869 is 96808808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65772100 + 15108769 = 8110^2 + 3887^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80880869 is a prime.

It is a super-2 number, since 2×80880869² = 13083429940390322, which contains 22 as substring.

Together with 80880871, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80880889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40440434 + 40440435.

It is an arithmetic number, because the mean of its divisors is an integer number (40440435).

Almost surely, 2^80880869 is an apocalyptic number.

It is an amenable number.

80880869 is a deficient number, since it is larger than the sum of its proper divisors (1).

80880869 is an equidigital number, since it uses as much as digits as its factorization.

80880869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 47.

The square root of 80880869 is about 8993.3791758160. The cubic root of 80880869 is about 432.4626477148.

The spelling of 80880869 in words is "eighty million, eight hundred eighty thousand, eight hundred sixty-nine".