1725640469 has 4 divisors (see below), whose sum is σ = 1972160544. Its totient is φ = 1479120396.

The previous prime is 1725640459. The next prime is 1725640487. The reversal of 1725640469 is 9640465271.

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.

It is a cyclic number.

It is not a de Polignac number, because 1725640469 - 2⁴ = 1725640453 is a prime.

It is a super-2 number, since 2×1725640469² = 5955670056501079922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1725640459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123260027 + ... + 123260040.

It is an arithmetic number, because the mean of its divisors is an integer number (493040136).

Almost surely, 2^1725640469 is an apocalyptic number.

It is an amenable number.

1725640469 is a deficient number, since it is larger than the sum of its proper divisors (246520075).

1725640469 is an equidigital number, since it uses as much as digits as its factorization.

1725640469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246520074.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 1725640469 is about 41540.8289397311. The cubic root of 1725640469 is about 1199.4535634789.

The spelling of 1725640469 in words is "one billion, seven hundred twenty-five million, six hundred forty thousand, four hundred sixty-nine".