1697397889 has 8 divisors (see below), whose sum is σ = 1949165280. Its totient is φ = 1461873600.

The previous prime is 1697397883. The next prime is 1697397913. The reversal of 1697397889 is 9887937961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1697397889 - 2⁵ = 1697397857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1697397883) 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 7 ways as a sum of consecutive naturals, for example, 4060552 + ... + 4060969.

It is an arithmetic number, because the mean of its divisors is an integer number (243645660).

Almost surely, 2^1697397889 is an apocalyptic number.

1697397889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1697397889 is a deficient number, since it is larger than the sum of its proper divisors (251767391).

1697397889 is a wasteful number, since it uses less digits than its factorization.

1697397889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121551.

The product of its digits is 41150592, while the sum is 67.

The square root of 1697397889 is about 41199.4889410051. The cubic root of 1697397889 is about 1192.8739445526.

The spelling of 1697397889 in words is "one billion, six hundred ninety-seven million, three hundred ninety-seven thousand, eight hundred eighty-nine".