79812479 has 2 divisors, whose sum is σ = 79812480. Its totient is φ = 79812478.

The previous prime is 79812457. The next prime is 79812497. The reversal of 79812479 is 97421897.

Together with next prime (79812497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79812479 - 2¹⁶ = 79746943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79812079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39906239 + 39906240.

It is an arithmetic number, because the mean of its divisors is an integer number (39906240).

Almost surely, 2^79812479 is an apocalyptic number.

79812479 is a deficient number, since it is larger than the sum of its proper divisors (1).

79812479 is an equidigital number, since it uses as much as digits as its factorization.

79812479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 79812479 is about 8933.7830172889. The cubic root of 79812479 is about 430.5500064889.

The spelling of 79812479 in words is "seventy-nine million, eight hundred twelve thousand, four hundred seventy-nine".