1397937173 has 2 divisors, whose sum is σ = 1397937174. Its totient is φ = 1397937172.

The previous prime is 1397937161. The next prime is 1397937193. The reversal of 1397937173 is 3717397931.

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., 1320813649 + 77123524 = 36343^2 + 8782^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397937173 - 2⁶ = 1397937109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1397937143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698968586 + 698968587.

It is an arithmetic number, because the mean of its divisors is an integer number (698968587).

Almost surely, 2^1397937173 is an apocalyptic number.

It is an amenable number.

1397937173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397937173 is an equidigital number, since it uses as much as digits as its factorization.

1397937173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 750141, while the sum is 50.

The square root of 1397937173 is about 37388.9980208082. The cubic root of 1397937173 is about 1118.1392287268.

The spelling of 1397937173 in words is "one billion, three hundred ninety-seven million, nine hundred thirty-seven thousand, one hundred seventy-three".