87813767 has 2 divisors, whose sum is σ = 87813768. Its totient is φ = 87813766.

The previous prime is 87813749. The next prime is 87813773. The reversal of 87813767 is 76731878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87813767 - 2⁶ = 87813703 is a prime.

It is a super-2 number, since 2×87813767² = 15422515349460578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87813707) 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, 43906883 + 43906884.

It is an arithmetic number, because the mean of its divisors is an integer number (43906884).

Almost surely, 2^87813767 is an apocalyptic number.

87813767 is a deficient number, since it is larger than the sum of its proper divisors (1).

87813767 is an equidigital number, since it uses as much as digits as its factorization.

87813767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 47.

The square root of 87813767 is about 9370.9000101378. The cubic root of 87813767 is about 444.4820249310.

The spelling of 87813767 in words is "eighty-seven million, eight hundred thirteen thousand, seven hundred sixty-seven".