2023639 has 2 divisors, whose sum is σ = 2023640. Its totient is φ = 2023638.

The previous prime is 2023621. The next prime is 2023661. The reversal of 2023639 is 9363202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2023639 - 2⁵ = 2023607 is a prime.

It is a super-2 number, since 2×2023639² = 8190229604642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011819 + 1011820.

It is an arithmetic number, because the mean of its divisors is an integer number (1011820).

2^2023639 is an apocalyptic number.

2023639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2023639 is an equidigital number, since it uses as much as digits as its factorization.

2023639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 2023639 is about 1422.5466600432. The cubic root of 2023639 is about 126.4865499404.

It can be divided in two parts, 2023 and 639, that added together give a palindrome (2662).

The spelling of 2023639 in words is "two million, twenty-three thousand, six hundred thirty-nine".