87445387 has 2 divisors, whose sum is σ = 87445388. Its totient is φ = 87445386.

The previous prime is 87445381. The next prime is 87445441. The reversal of 87445387 is 78354478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87445387 - 2¹⁹ = 86921099 is a prime.

It is not a weakly prime, because it can be changed into another prime (87445381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43722693 + 43722694.

It is an arithmetic number, because the mean of its divisors is an integer number (43722694).

Almost surely, 2^87445387 is an apocalyptic number.

87445387 is a deficient number, since it is larger than the sum of its proper divisors (1).

87445387 is an equidigital number, since it uses as much as digits as its factorization.

87445387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 46.

The square root of 87445387 is about 9351.2238236500. The cubic root of 87445387 is about 443.8596176460.

Subtracting from 87445387 its reverse (78354478), we obtain a palindrome (9090909).

The spelling of 87445387 in words is "eighty-seven million, four hundred forty-five thousand, three hundred eighty-seven".