87944971 has 2 divisors, whose sum is σ = 87944972. Its totient is φ = 87944970.

The previous prime is 87944929. The next prime is 87944999. The reversal of 87944971 is 17944978.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87944971 - 2¹¹ = 87942923 is a prime.

It is not a weakly prime, because it can be changed into another prime (87944911) 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, 43972485 + 43972486.

It is an arithmetic number, because the mean of its divisors is an integer number (43972486).

Almost surely, 2^87944971 is an apocalyptic number.

87944971 is a deficient number, since it is larger than the sum of its proper divisors (1).

87944971 is an equidigital number, since it uses as much as digits as its factorization.

87944971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 87944971 is about 9377.8980054168. The cubic root of 87944971 is about 444.7032840841.

The spelling of 87944971 in words is "eighty-seven million, nine hundred forty-four thousand, nine hundred seventy-one".