2563967 has 8 divisors (see below), whose sum is σ = 2950176. Its totient is φ = 2182752.

The previous prime is 2563943. The next prime is 2563969. The reversal of 2563967 is 7693652.

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

It is a cyclic number.

It is not a de Polignac number, because 2563967 - 2⁸ = 2563711 is a prime.

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 2563967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563969) 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, 68 + ... + 2265.

It is an arithmetic number, because the mean of its divisors is an integer number (368772).

2^2563967 is an apocalyptic number.

2563967 is a deficient number, since it is larger than the sum of its proper divisors (386209).

2563967 is a wasteful number, since it uses less digits than its factorization.

2563967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2497.

The product of its digits is 68040, while the sum is 38.

The square root of 2563967 is about 1601.2392076139. The cubic root of 2563967 is about 136.8687004600.

The spelling of 2563967 in words is "two million, five hundred sixty-three thousand, nine hundred sixty-seven".