87644411 has 2 divisors, whose sum is σ = 87644412. Its totient is φ = 87644410.

The previous prime is 87644399. The next prime is 87644413. The reversal of 87644411 is 11444678.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87644411 is a prime.

Together with 87644413, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (87644413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43822205 + 43822206.

It is an arithmetic number, because the mean of its divisors is an integer number (43822206).

Almost surely, 2^87644411 is an apocalyptic number.

87644411 is a deficient number, since it is larger than the sum of its proper divisors (1).

87644411 is an equidigital number, since it uses as much as digits as its factorization.

87644411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 35.

The square root of 87644411 is about 9361.8593772818. The cubic root of 87644411 is about 444.1961011172.

The spelling of 87644411 in words is "eighty-seven million, six hundred forty-four thousand, four hundred eleven".