2320639 has 2 divisors, whose sum is σ = 2320640. Its totient is φ = 2320638.

The previous prime is 2320627. The next prime is 2320649. The reversal of 2320639 is 9360232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2320639 - 2⁷ = 2320511 is a prime.

It is an Ulam number.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2320649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160319 + 1160320.

It is an arithmetic number, because the mean of its divisors is an integer number (1160320).

2^2320639 is an apocalyptic number.

2320639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2320639 is an equidigital number, since it uses as much as digits as its factorization.

2320639 is an evil number, because the sum of its binary digits is even.

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

The square root of 2320639 is about 1523.3643687575. The cubic root of 2320639 is about 132.3942718928.

It can be divided in two parts, 2 and 320639, that multiplied together give a triangular number (641278 = T₁₁₃₂).

The spelling of 2320639 in words is "two million, three hundred twenty thousand, six hundred thirty-nine".