1397765613 has 8 divisors (see below), whose sum is σ = 1914057568. Its totient is φ = 906658704.

The previous prime is 1397765597. The next prime is 1397765623. The reversal of 1397765613 is 3165677931.

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

It is not a de Polignac number, because 1397765613 - 2⁴ = 1397765597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397765623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6296131 + ... + 6296352.

It is an arithmetic number, because the mean of its divisors is an integer number (239257196).

Almost surely, 2^1397765613 is an apocalyptic number.

It is an amenable number.

1397765613 is a deficient number, since it is larger than the sum of its proper divisors (516291955).

1397765613 is a wasteful number, since it uses less digits than its factorization.

1397765613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12592523.

The product of its digits is 714420, while the sum is 48.

The square root of 1397765613 is about 37386.7036926231. The cubic root of 1397765613 is about 1118.0934861337.

The spelling of 1397765613 in words is "one billion, three hundred ninety-seven million, seven hundred sixty-five thousand, six hundred thirteen".