1396859197 has 4 divisors (see below), whose sum is σ = 1398545020. Its totient is φ = 1395173376.

The previous prime is 1396859159. The next prime is 1396859203. The reversal of 1396859197 is 7919586931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 546203641 + 850655556 = 23371^2 + 29166^2 .

It is a cyclic number.

It is not a de Polignac number, because 1396859197 - 2¹¹ = 1396857149 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 (1396359197) 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, 841668 + ... + 843325.

It is an arithmetic number, because the mean of its divisors is an integer number (349636255).

Almost surely, 2^1396859197 is an apocalyptic number.

It is an amenable number.

1396859197 is a deficient number, since it is larger than the sum of its proper divisors (1685823).

1396859197 is an equidigital number, since it uses as much as digits as its factorization.

1396859197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685822.

The product of its digits is 3674160, while the sum is 58.

The square root of 1396859197 is about 37374.5795561636. The cubic root of 1396859197 is about 1117.8517486630.

The spelling of 1396859197 in words is "one billion, three hundred ninety-six million, eight hundred fifty-nine thousand, one hundred ninety-seven".