79469569 has 2 divisors, whose sum is σ = 79469570. Its totient is φ = 79469568.

The previous prime is 79469567. The next prime is 79469573. The reversal of 79469569 is 96596497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55577025 + 23892544 = 7455^2 + 4888^2 .

It is a cyclic number.

It is not a de Polignac number, because 79469569 - 2¹ = 79469567 is a prime.

It is a super-2 number, since 2×79469569² = 12630824794091522, which contains 22 as substring.

Together with 79469567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (79469567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39734784 + 39734785.

It is an arithmetic number, because the mean of its divisors is an integer number (39734785).

Almost surely, 2^79469569 is an apocalyptic number.

It is an amenable number.

79469569 is a deficient number, since it is larger than the sum of its proper divisors (1).

79469569 is an equidigital number, since it uses as much as digits as its factorization.

79469569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3674160, while the sum is 55.

The square root of 79469569 is about 8914.5706009880. The cubic root of 79469569 is about 429.9325096889.

The spelling of 79469569 in words is "seventy-nine million, four hundred sixty-nine thousand, five hundred sixty-nine".