1396731073 has 2 divisors, whose sum is σ = 1396731074. Its totient is φ = 1396731072.

The previous prime is 1396731047. The next prime is 1396731079. The reversal of 1396731073 is 3701376931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1335390849 + 61340224 = 36543^2 + 7832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1396731073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1396731079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698365536 + 698365537.

It is an arithmetic number, because the mean of its divisors is an integer number (698365537).

Almost surely, 2^1396731073 is an apocalyptic number.

It is an amenable number.

1396731073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396731073 is an equidigital number, since it uses as much as digits as its factorization.

1396731073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 40.

The square root of 1396731073 is about 37372.8654641305. The cubic root of 1396731073 is about 1117.8175700770.

The spelling of 1396731073 in words is "one billion, three hundred ninety-six million, seven hundred thirty-one thousand, seventy-three".