79428047 has 2 divisors, whose sum is σ = 79428048. Its totient is φ = 79428046.

The previous prime is 79428043. The next prime is 79428053. The reversal of 79428047 is 74082497.

It is a weak prime.

It is an emirp because it is prime and its reverse (74082497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79428047 - 2² = 79428043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 79427995 and 79428013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79428043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39714023 + 39714024.

It is an arithmetic number, because the mean of its divisors is an integer number (39714024).

Almost surely, 2^79428047 is an apocalyptic number.

79428047 is a deficient number, since it is larger than the sum of its proper divisors (1).

79428047 is an equidigital number, since it uses as much as digits as its factorization.

79428047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 79428047 is about 8912.2414127985. The cubic root of 79428047 is about 429.8576182644.

The spelling of 79428047 in words is "seventy-nine million, four hundred twenty-eight thousand, forty-seven".