71279899 has 2 divisors, whose sum is σ = 71279900. Its totient is φ = 71279898.

The previous prime is 71279843. The next prime is 71279909. The reversal of 71279899 is 99897217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71279899 - 2¹⁷ = 71148827 is a prime.

It is not a weakly prime, because it can be changed into another prime (71276899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35639949 + 35639950.

It is an arithmetic number, because the mean of its divisors is an integer number (35639950).

Almost surely, 2^71279899 is an apocalyptic number.

71279899 is a deficient number, since it is larger than the sum of its proper divisors (1).

71279899 is an equidigital number, since it uses as much as digits as its factorization.

71279899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 52.

The square root of 71279899 is about 8442.7423862155. The cubic root of 71279899 is about 414.6251979665.

The spelling of 71279899 in words is "seventy-one million, two hundred seventy-nine thousand, eight hundred ninety-nine".