2563819 has 2 divisors, whose sum is σ = 2563820. Its totient is φ = 2563818.

The previous prime is 2563811. The next prime is 2563837. The reversal of 2563819 is 9183652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2563819 - 2³ = 2563811 is a prime.

It is a super-2 number, since 2×2563819² = 13146335729522, which contains 22 as substring.

2563819 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2563811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1281909 + 1281910.

It is an arithmetic number, because the mean of its divisors is an integer number (1281910).

2^2563819 is an apocalyptic number.

2563819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2563819 is an equidigital number, since it uses as much as digits as its factorization.

2563819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 2563819 is about 1601.1929927401. The cubic root of 2563819 is about 136.8660669163.

The spelling of 2563819 in words is "two million, five hundred sixty-three thousand, eight hundred nineteen".