80649299 has 2 divisors, whose sum is σ = 80649300. Its totient is φ = 80649298.

The previous prime is 80649269. The next prime is 80649301. The reversal of 80649299 is 99294608.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80649299 - 2⁸ = 80649043 is a prime.

Together with 80649301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80649229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40324649 + 40324650.

It is an arithmetic number, because the mean of its divisors is an integer number (40324650).

Almost surely, 2^80649299 is an apocalyptic number.

80649299 is a deficient number, since it is larger than the sum of its proper divisors (1).

80649299 is an equidigital number, since it uses as much as digits as its factorization.

80649299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 80649299 is about 8980.4954763086. The cubic root of 80649299 is about 432.0495252863.

It can be divided in two parts, 806 and 49299, that added together give a palindrome (50105).

The spelling of 80649299 in words is "eighty million, six hundred forty-nine thousand, two hundred ninety-nine".