259968639 has 8 divisors (see below), whose sum is σ = 396142720. Its totient is φ = 148553496.

The previous prime is 259968637. The next prime is 259968649. The reversal of 259968639 is 936869952.

259968639 is nontrivially palindromic in base 16.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 259968639 - 2¹ = 259968637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259968637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6189709 + ... + 6189750.

It is an arithmetic number, because the mean of its divisors is an integer number (49517840).

Almost surely, 2^259968639 is an apocalyptic number.

259968639 is a deficient number, since it is larger than the sum of its proper divisors (136174081).

259968639 is a wasteful number, since it uses less digits than its factorization.

259968639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12379469.

The product of its digits is 6298560, while the sum is 57.

The square root of 259968639 is about 16123.5430039430. The cubic root of 259968639 is about 638.2247670955.

The spelling of 259968639 in words is "two hundred fifty-nine million, nine hundred sixty-eight thousand, six hundred thirty-nine".