87111379 has 2 divisors, whose sum is σ = 87111380. Its totient is φ = 87111378.

The previous prime is 87111359. The next prime is 87111407. The reversal of 87111379 is 97311178.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87111379 is a prime.

It is not a weakly prime, because it can be changed into another prime (87111329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43555689 + 43555690.

It is an arithmetic number, because the mean of its divisors is an integer number (43555690).

Almost surely, 2^87111379 is an apocalyptic number.

87111379 is a deficient number, since it is larger than the sum of its proper divisors (1).

87111379 is an equidigital number, since it uses as much as digits as its factorization.

87111379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 37.

The square root of 87111379 is about 9333.3476845128. The cubic root of 87111379 is about 443.2937718229.

The spelling of 87111379 in words is "eighty-seven million, one hundred eleven thousand, three hundred seventy-nine".