87644339 has 2 divisors, whose sum is σ = 87644340. Its totient is φ = 87644338.

The previous prime is 87644309. The next prime is 87644353. The reversal of 87644339 is 93344678.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87644339 - 2²⁰ = 86595763 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87644339.

It is not a weakly prime, because it can be changed into another prime (87644309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43822169 + 43822170.

It is an arithmetic number, because the mean of its divisors is an integer number (43822170).

Almost surely, 2^87644339 is an apocalyptic number.

87644339 is a deficient number, since it is larger than the sum of its proper divisors (1).

87644339 is an equidigital number, since it uses as much as digits as its factorization.

87644339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 44.

The square root of 87644339 is about 9361.8555318911. The cubic root of 87644339 is about 444.1959794813.

The spelling of 87644339 in words is "eighty-seven million, six hundred forty-four thousand, three hundred thirty-nine".