259645949 has 4 divisors (see below), whose sum is σ = 260088864. Its totient is φ = 259203036.

The previous prime is 259645943. The next prime is 259645979. The reversal of 259645949 is 949546952.

It is a happy number.

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 259645949 - 2⁴ = 259645933 is a prime.

It is a super-2 number, since 2×259645949² = 134832037664221202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 259645949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259645943) 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, 220577 + ... + 221750.

It is an arithmetic number, because the mean of its divisors is an integer number (65022216).

Almost surely, 2^259645949 is an apocalyptic number.

It is an amenable number.

259645949 is a deficient number, since it is larger than the sum of its proper divisors (442915).

259645949 is an equidigital number, since it uses as much as digits as its factorization.

259645949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442914.

The product of its digits is 3499200, while the sum is 53.

The square root of 259645949 is about 16113.5331010924. The cubic root of 259645949 is about 637.9605890495.

It can be divided in two parts, 25964 and 5949, that added together give a palindrome (31913).

The spelling of 259645949 in words is "two hundred fifty-nine million, six hundred forty-five thousand, nine hundred forty-nine".