79489469 has 4 divisors (see below), whose sum is σ = 79522044. Its totient is φ = 79456896.

The previous prime is 79489457. The next prime is 79489489. The reversal of 79489469 is 96498497.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96498497 = 113 ⋅853969.

It can be written as a sum of positive squares in 2 ways, for example, as 63409369 + 16080100 = 7963^2 + 4010^2 .

It is a cyclic number.

It is not a de Polignac number, because 79489469 - 2⁸ = 79489213 is a prime.

It is a super-2 number, since 2×79489469² = 12637151363803922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79489409) 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 in 3 ways as a sum of consecutive naturals, for example, 12302 + ... + 17615.

It is an arithmetic number, because the mean of its divisors is an integer number (19880511).

Almost surely, 2^79489469 is an apocalyptic number.

It is an amenable number.

79489469 is a deficient number, since it is larger than the sum of its proper divisors (32575).

79489469 is a wasteful number, since it uses less digits than its factorization.

79489469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32574.

The product of its digits is 3919104, while the sum is 56.

The square root of 79489469 is about 8915.6866813499. The cubic root of 79489469 is about 429.9683932059.

Subtracting 79489469 from its reverse (96498497), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 79489469 in words is "seventy-nine million, four hundred eighty-nine thousand, four hundred sixty-nine".