1397036609 has 4 divisors (see below), whose sum is σ = 1398251520. Its totient is φ = 1395821700.

The previous prime is 1397036581. The next prime is 1397036623. The reversal of 1397036609 is 9066307931.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9066307931 = 829 ⋅10936439.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1397036609 is a prime.

It is a super-2 number, since 2×1397036609² = 3903422573772437762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1397036609.

It is not an unprimeable number, because it can be changed into a prime (1397036309) 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, 605729 + ... + 608030.

It is an arithmetic number, because the mean of its divisors is an integer number (349562880).

Almost surely, 2^1397036609 is an apocalyptic number.

It is an amenable number.

1397036609 is a deficient number, since it is larger than the sum of its proper divisors (1214911).

1397036609 is a wasteful number, since it uses less digits than its factorization.

1397036609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214910.

The product of its (nonzero) digits is 183708, while the sum is 44.

The square root of 1397036609 is about 37376.9529121891. The cubic root of 1397036609 is about 1117.8990719531.

The spelling of 1397036609 in words is "one billion, three hundred ninety-seven million, thirty-six thousand, six hundred nine".