1239697 has 2 divisors, whose sum is σ = 1239698. Its totient is φ = 1239696.

The previous prime is 1239671. The next prime is 1239727. The reversal of 1239697 is 7969321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 968256 + 271441 = 984^2 + 521^2 .

It is an emirp because it is prime and its reverse (7969321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1239697 - 2⁷ = 1239569 is a prime.

It is a Chen prime.

1239697 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1239607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619848 + 619849.

It is an arithmetic number, because the mean of its divisors is an integer number (619849).

2^1239697 is an apocalyptic number.

It is an amenable number.

1239697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239697 is an equidigital number, since it uses as much as digits as its factorization.

1239697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 37.

The square root of 1239697 is about 1113.4168132375. The cubic root of 1239697 is about 107.4249557373.

It can be divided in two parts, 1239 and 697, that added together give a square (1936 = 44²).

The spelling of 1239697 in words is "one million, two hundred thirty-nine thousand, six hundred ninety-seven".