1725863969 has 2 divisors, whose sum is σ = 1725863970. Its totient is φ = 1725863968.

The previous prime is 1725863891. The next prime is 1725864011. The reversal of 1725863969 is 9693685271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1237984225 + 487879744 = 35185^2 + 22088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1725863969 is a prime.

It is a super-2 number, since 2×1725863969² = 5957212878984865922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1725863869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 862931984 + 862931985.

It is an arithmetic number, because the mean of its divisors is an integer number (862931985).

Almost surely, 2^1725863969 is an apocalyptic number.

It is an amenable number.

1725863969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1725863969 is an equidigital number, since it uses as much as digits as its factorization.

1725863969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 56.

The square root of 1725863969 is about 41543.5189770920. The cubic root of 1725863969 is about 1199.5053445043.

The spelling of 1725863969 in words is "one billion, seven hundred twenty-five million, eight hundred sixty-three thousand, nine hundred sixty-nine".