80029969 has 2 divisors, whose sum is σ = 80029970. Its totient is φ = 80029968.

The previous prime is 80029967. The next prime is 80029981. The reversal of 80029969 is 96992008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79869969 + 160000 = 8937^2 + 400^2 .

It is a cyclic number.

It is not a de Polignac number, because 80029969 - 2¹ = 80029967 is a prime.

It is a super-2 number, since 2×80029969² = 12809591876281922, which contains 22 as substring.

Together with 80029967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80029967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40014984 + 40014985.

It is an arithmetic number, because the mean of its divisors is an integer number (40014985).

Almost surely, 2^80029969 is an apocalyptic number.

It is an amenable number.

80029969 is a deficient number, since it is larger than the sum of its proper divisors (1).

80029969 is an equidigital number, since it uses as much as digits as its factorization.

80029969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 80029969 is about 8945.9470711602. The cubic root of 80029969 is about 430.9407365001.

It can be divided in two parts, 8002 and 9969, that added together give a palindrome (17971).

The spelling of 80029969 in words is "eighty million, twenty-nine thousand, nine hundred sixty-nine".