1725689897 has 4 divisors (see below), whose sum is σ = 1727061840. Its totient is φ = 1724317956.

The previous prime is 1725689887. The next prime is 1725689923. The reversal of 1725689897 is 7989865271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7989865271 = 83 ⋅96263437.

It is a cyclic number.

It is not a de Polignac number, because 1725689897 - 2⁴ = 1725689881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1725689837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 684083 + ... + 686600.

It is an arithmetic number, because the mean of its divisors is an integer number (431765460).

Almost surely, 2^1725689897 is an apocalyptic number.

It is an amenable number.

1725689897 is a deficient number, since it is larger than the sum of its proper divisors (1371943).

1725689897 is a wasteful number, since it uses less digits than its factorization.

1725689897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371942.

The product of its digits is 15240960, while the sum is 62.

The square root of 1725689897 is about 41541.4238682306. The cubic root of 1725689897 is about 1199.4650154636.

The spelling of 1725689897 in words is "one billion, seven hundred twenty-five million, six hundred eighty-nine thousand, eight hundred ninety-seven".