87682381 has 2 divisors, whose sum is σ = 87682382. Its totient is φ = 87682380.

The previous prime is 87682369. The next prime is 87682391. The reversal of 87682381 is 18328678.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82065481 + 5616900 = 9059^2 + 2370^2 .

It is a cyclic number.

It is not a de Polignac number, because 87682381 - 2⁵ = 87682349 is a prime.

It is a super-2 number, since 2×87682381² = 15376399875658322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87682351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43841190 + 43841191.

It is an arithmetic number, because the mean of its divisors is an integer number (43841191).

Almost surely, 2^87682381 is an apocalyptic number.

It is an amenable number.

87682381 is a deficient number, since it is larger than the sum of its proper divisors (1).

87682381 is an equidigital number, since it uses as much as digits as its factorization.

87682381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 87682381 is about 9363.8870668115. The cubic root of 87682381 is about 444.2602378972.

The spelling of 87682381 in words is "eighty-seven million, six hundred eighty-two thousand, three hundred eighty-one".