1397680565 has 8 divisors (see below), whose sum is σ = 1765491360. Its totient is φ = 1059294672.

The previous prime is 1397680519. The next prime is 1397680573. The reversal of 1397680565 is 5650867931.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1397680565 - 2¹⁰ = 1397679541 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7356119 + ... + 7356308.

It is an arithmetic number, because the mean of its divisors is an integer number (220686420).

Almost surely, 2^1397680565 is an apocalyptic number.

It is an amenable number.

1397680565 is a deficient number, since it is larger than the sum of its proper divisors (367810795).

1397680565 is a wasteful number, since it uses less digits than its factorization.

1397680565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14712451.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The square root of 1397680565 is about 37385.5662656058. The cubic root of 1397680565 is about 1118.0708086207.

The spelling of 1397680565 in words is "one billion, three hundred ninety-seven million, six hundred eighty thousand, five hundred sixty-five".