79928297 has 2 divisors, whose sum is σ = 79928298. Its totient is φ = 79928296.

The previous prime is 79928287. The next prime is 79928351. The reversal of 79928297 is 79282997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79637776 + 290521 = 8924^2 + 539^2 .

It is an emirp because it is prime and its reverse (79282997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79928297 - 2⁴ = 79928281 is a prime.

It is a super-2 number, since 2×79928297² = 12777065322640418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79928207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39964148 + 39964149.

It is an arithmetic number, because the mean of its divisors is an integer number (39964149).

Almost surely, 2^79928297 is an apocalyptic number.

It is an amenable number.

79928297 is a deficient number, since it is larger than the sum of its proper divisors (1).

79928297 is an equidigital number, since it uses as much as digits as its factorization.

79928297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The square root of 79928297 is about 8940.2626918900. The cubic root of 79928297 is about 430.7581666678.

The spelling of 79928297 in words is "seventy-nine million, nine hundred twenty-eight thousand, two hundred ninety-seven".