87418843 has 2 divisors, whose sum is σ = 87418844. Its totient is φ = 87418842.

The previous prime is 87418841. The next prime is 87418873. The reversal of 87418843 is 34881478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87418843 - 2¹ = 87418841 is a prime.

It is a super-2 number, since 2×87418843² = 15284108222917298, which contains 22 as substring.

Together with 87418841, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 87418843.

It is not a weakly prime, because it can be changed into another prime (87418841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43709421 + 43709422.

It is an arithmetic number, because the mean of its divisors is an integer number (43709422).

Almost surely, 2^87418843 is an apocalyptic number.

87418843 is a deficient number, since it is larger than the sum of its proper divisors (1).

87418843 is an equidigital number, since it uses as much as digits as its factorization.

87418843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 43.

The square root of 87418843 is about 9349.8044364575. The cubic root of 87418843 is about 443.8147019852.

The spelling of 87418843 in words is "eighty-seven million, four hundred eighteen thousand, eight hundred forty-three".