79406869 has 2 divisors, whose sum is σ = 79406870. Its totient is φ = 79406868.

The previous prime is 79406867. The next prime is 79406891. The reversal of 79406869 is 96860497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79388100 + 18769 = 8910^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 79406869 - 2¹ = 79406867 is a prime.

It is a super-2 number, since 2×79406869² = 12610901688766322, which contains 22 as substring.

Together with 79406867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79406863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39703434 + 39703435.

It is an arithmetic number, because the mean of its divisors is an integer number (39703435).

Almost surely, 2^79406869 is an apocalyptic number.

It is an amenable number.

79406869 is a deficient number, since it is larger than the sum of its proper divisors (1).

79406869 is an equidigital number, since it uses as much as digits as its factorization.

79406869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 79406869 is about 8911.0531925244. The cubic root of 79406869 is about 429.8194103761.

The spelling of 79406869 in words is "seventy-nine million, four hundred six thousand, eight hundred sixty-nine".