87682391 has 2 divisors, whose sum is σ = 87682392. Its totient is φ = 87682390.

The previous prime is 87682381. The next prime is 87682393. The reversal of 87682391 is 19328678.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87682391 - 2²² = 83488087 is a prime.

Together with 87682393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87682393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43841195 + 43841196.

It is an arithmetic number, because the mean of its divisors is an integer number (43841196).

Almost surely, 2^87682391 is an apocalyptic number.

87682391 is a deficient number, since it is larger than the sum of its proper divisors (1).

87682391 is an equidigital number, since it uses as much as digits as its factorization.

87682391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 87682391 is about 9363.8876007778. The cubic root of 87682391 is about 444.2602547862.

The spelling of 87682391 in words is "eighty-seven million, six hundred eighty-two thousand, three hundred ninety-one".