79806269 has 4 divisors (see below), whose sum is σ = 79847196. Its totient is φ = 79765344.

The previous prime is 79806263. The next prime is 79806277. The reversal of 79806269 is 96260897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96260897 = 19 ⋅5066363.

It can be written as a sum of positive squares in 2 ways, for example, as 66227044 + 13579225 = 8138^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 79806269 - 2⁴ = 79806253 is a prime.

It is a super-2 number, since 2×79806269² = 12738081143400722, 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 (79806263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17384 + ... + 21489.

It is an arithmetic number, because the mean of its divisors is an integer number (19961799).

Almost surely, 2^79806269 is an apocalyptic number.

It is an amenable number.

79806269 is a deficient number, since it is larger than the sum of its proper divisors (40927).

79806269 is a wasteful number, since it uses less digits than its factorization.

79806269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40926.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 79806269 is about 8933.4354533964. The cubic root of 79806269 is about 430.5388395431.

The spelling of 79806269 in words is "seventy-nine million, eight hundred six thousand, two hundred sixty-nine".