1397873 has 2 divisors, whose sum is σ = 1397874. Its totient is φ = 1397872.

The previous prime is 1397861. The next prime is 1397881. The reversal of 1397873 is 3787931.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1385329 + 12544 = 1177^2 + 112^2 .

It is a cyclic number.

It is not a de Polignac number, because 1397873 - 2⁴ = 1397857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1397833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698936 + 698937.

It is an arithmetic number, because the mean of its divisors is an integer number (698937).

2^1397873 is an apocalyptic number.

It is an amenable number.

1397873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1397873 is an equidigital number, since it uses as much as digits as its factorization.

1397873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 38.

The square root of 1397873 is about 1182.3167934188. The cubic root of 1397873 is about 111.8122118886.

The spelling of 1397873 in words is "one million, three hundred ninety-seven thousand, eight hundred seventy-three".