1209104797 has 4 divisors (see below), whose sum is σ = 1215785116. Its totient is φ = 1202424480.

The previous prime is 1209104791. The next prime is 1209104837. The reversal of 1209104797 is 7974019021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7974019021 = 21143 ⋅377147.

It can be written as a sum of positive squares in 2 ways, for example, as 170589721 + 1038515076 = 13061^2 + 32226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1209104797 - 2³ = 1209104789 is a prime.

It is a super-2 number, since 2×1209104797² = 2923868820256822418, 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 (1209104791) 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, 3339888 + ... + 3340249.

It is an arithmetic number, because the mean of its divisors is an integer number (303946279).

Almost surely, 2^1209104797 is an apocalyptic number.

It is an amenable number.

1209104797 is a deficient number, since it is larger than the sum of its proper divisors (6680319).

1209104797 is an equidigital number, since it uses as much as digits as its factorization.

1209104797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6680318.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 1209104797 is about 34772.1842425810. The cubic root of 1209104797 is about 1065.3393812110.

The spelling of 1209104797 in words is "one billion, two hundred nine million, one hundred four thousand, seven hundred ninety-seven".