1639097 has 2 divisors, whose sum is σ = 1639098. Its totient is φ = 1639096.

The previous prime is 1639091. The next prime is 1639147. The reversal of 1639097 is 7909361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032256 + 606841 = 1016^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 1639097 - 2⁴ = 1639081 is a prime.

It is not a weakly prime, because it can be changed into another prime (1639091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819548 + 819549.

It is an arithmetic number, because the mean of its divisors is an integer number (819549).

2^1639097 is an apocalyptic number.

It is an amenable number.

1639097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639097 is an equidigital number, since it uses as much as digits as its factorization.

1639097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 1639097 is about 1280.2722366747. The cubic root of 1639097 is about 117.9057228388.

The spelling of 1639097 in words is "one million, six hundred thirty-nine thousand, ninety-seven".