1699725897 has 16 divisors (see below), whose sum is σ = 2519030080. Its totient is φ = 1132737696.

The previous prime is 1699725893. The next prime is 1699725961. The reversal of 1699725897 is 7985279961.

It is not a de Polignac number, because 1699725897 - 2² = 1699725893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1699725893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76173 + ... + 95925.

It is an arithmetic number, because the mean of its divisors is an integer number (157439380).

Almost surely, 2^1699725897 is an apocalyptic number.

It is an amenable number.

1699725897 is a deficient number, since it is larger than the sum of its proper divisors (819304183).

1699725897 is a wasteful number, since it uses less digits than its factorization.

1699725897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22949 (or 22943 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 63.

The square root of 1699725897 is about 41227.7321350569. The cubic root of 1699725897 is about 1193.4190439063.

The spelling of 1699725897 in words is "one billion, six hundred ninety-nine million, seven hundred twenty-five thousand, eight hundred ninety-seven".