797242209 has 4 divisors (see below), whose sum is σ = 1062989616. Its totient is φ = 531494804.

The previous prime is 797242207. The next prime is 797242249. The reversal of 797242209 is 902242797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 797242209 - 2¹ = 797242207 is a prime.

It is a super-2 number, since 2×797242209² = 1271190279622399362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (797242207) 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, 132873699 + ... + 132873704.

It is an arithmetic number, because the mean of its divisors is an integer number (265747404).

Almost surely, 2^797242209 is an apocalyptic number.

It is an amenable number.

797242209 is a deficient number, since it is larger than the sum of its proper divisors (265747407).

797242209 is a wasteful number, since it uses less digits than its factorization.

797242209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265747406.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 797242209 is about 28235.4778426008. The cubic root of 797242209 is about 927.2498276413.

The spelling of 797242209 in words is "seven hundred ninety-seven million, two hundred forty-two thousand, two hundred nine".