1697139 has 16 divisors (see below), whose sum is σ = 2534400. Its totient is φ = 1122408.

The previous prime is 1697107. The next prime is 1697149. The reversal of 1697139 is 9317961.

It is not a de Polignac number, because 1697139 - 2⁵ = 1697107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1697149) 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 in 15 ways as a sum of consecutive naturals, for example, 6322 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (158400).

2^1697139 is an apocalyptic number.

1697139 is a deficient number, since it is larger than the sum of its proper divisors (837261).

1697139 is a wasteful number, since it uses less digits than its factorization.

1697139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 505 counting only the distinct ones).

The product of its digits is 10206, while the sum is 36.

The square root of 1697139 is about 1302.7428756282. The cubic root of 1697139 is about 119.2813295319.

The spelling of 1697139 in words is "one million, six hundred ninety-seven thousand, one hundred thirty-nine".