2639953 has 2 divisors, whose sum is σ = 2639954. Its totient is φ = 2639952.

The previous prime is 2639941. The next prime is 2639969. The reversal of 2639953 is 3599362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2585664 + 54289 = 1608^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2639953 - 2⁵ = 2639921 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2²¹ + 6³ + 3⁸ + 9³ + 9³ + 5⁵ + 3¹² .

2639953 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2639353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319976 + 1319977.

It is an arithmetic number, because the mean of its divisors is an integer number (1319977).

2^2639953 is an apocalyptic number.

It is an amenable number.

2639953 is a deficient number, since it is larger than the sum of its proper divisors (1).

2639953 is an equidigital number, since it uses as much as digits as its factorization.

2639953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 37.

The square root of 2639953 is about 1624.7932176126. The cubic root of 2639953 is about 138.2076444189.

The spelling of 2639953 in words is "two million, six hundred thirty-nine thousand, nine hundred fifty-three".