259440369 has 4 divisors (see below), whose sum is σ = 345920496. Its totient is φ = 172960244.

The previous prime is 259440367. The next prime is 259440373. The reversal of 259440369 is 963044952.

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 259440369 - 2¹ = 259440367 is a prime.

It is a super-2 number, since 2×259440369² = 134618610133712322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 259440369.

It is not an unprimeable number, because it can be changed into a prime (259440361) 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, 43240059 + ... + 43240064.

It is an arithmetic number, because the mean of its divisors is an integer number (86480124).

Almost surely, 2^259440369 is an apocalyptic number.

It is an amenable number.

259440369 is a deficient number, since it is larger than the sum of its proper divisors (86480127).

259440369 is an equidigital number, since it uses as much as digits as its factorization.

259440369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86480126.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 259440369 is about 16107.1527279032. The cubic root of 259440369 is about 637.7921718032.

The spelling of 259440369 in words is "two hundred fifty-nine million, four hundred forty thousand, three hundred sixty-nine".