87800381 has 2 divisors, whose sum is σ = 87800382. Its totient is φ = 87800380.

The previous prime is 87800357. The next prime is 87800389. The reversal of 87800381 is 18300878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87796900 + 3481 = 9370^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 87800381 - 2¹⁰ = 87799357 is a prime.

It is a super-2 number, since 2×87800381² = 15417813807490322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87800389) 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, 43900190 + 43900191.

It is an arithmetic number, because the mean of its divisors is an integer number (43900191).

Almost surely, 2^87800381 is an apocalyptic number.

It is an amenable number.

87800381 is a deficient number, since it is larger than the sum of its proper divisors (1).

87800381 is an equidigital number, since it uses as much as digits as its factorization.

87800381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 87800381 is about 9370.1857505601. The cubic root of 87800381 is about 444.4594387279.

The spelling of 87800381 in words is "eighty-seven million, eight hundred thousand, three hundred eighty-one".