1397064161 has 2 divisors, whose sum is σ = 1397064162. Its totient is φ = 1397064160.

The previous prime is 1397064157. The next prime is 1397064173. The reversal of 1397064161 is 1614607931.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032979600 + 364084561 = 32140^2 + 19081^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397064161 - 2² = 1397064157 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397064191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698532080 + 698532081.

It is an arithmetic number, because the mean of its divisors is an integer number (698532081).

Almost surely, 2^1397064161 is an apocalyptic number.

It is an amenable number.

1397064161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397064161 is an equidigital number, since it uses as much as digits as its factorization.

1397064161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 1397064161 is about 37377.3214797422. The cubic root of 1397064161 is about 1117.9064208783.

The spelling of 1397064161 in words is "one billion, three hundred ninety-seven million, sixty-four thousand, one hundred sixty-one".