2563947 has 8 divisors (see below), whose sum is σ = 3798480. Its totient is φ = 1709280.

The previous prime is 2563943. The next prime is 2563969. The reversal of 2563947 is 7493652.

2563947 is a `hidden beast` number, since 2 + 563 + 94 + 7 = 666.

It is not a de Polignac number, because 2563947 - 2² = 2563943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2563943) 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, 47454 + ... + 47507.

It is an arithmetic number, because the mean of its divisors is an integer number (474810).

2^2563947 is an apocalyptic number.

2563947 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2563947 is a deficient number, since it is larger than the sum of its proper divisors (1234533).

2563947 is an equidigital number, since it uses as much as digits as its factorization.

2563947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94970 (or 94964 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 2563947 is about 1601.2329624386. The cubic root of 2563947 is about 136.8683445816.

The spelling of 2563947 in words is "two million, five hundred sixty-three thousand, nine hundred forty-seven".