87445507 has 2 divisors, whose sum is σ = 87445508. Its totient is φ = 87445506.

The previous prime is 87445487. The next prime is 87445537. The reversal of 87445507 is 70554478.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87445507 - 2¹¹ = 87443459 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87445507.

It is not a weakly prime, because it can be changed into another prime (87445537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43722753 + 43722754.

It is an arithmetic number, because the mean of its divisors is an integer number (43722754).

Almost surely, 2^87445507 is an apocalyptic number.

87445507 is a deficient number, since it is larger than the sum of its proper divisors (1).

87445507 is an equidigital number, since it uses as much as digits as its factorization.

87445507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 87445507 is about 9351.2302399203. The cubic root of 87445507 is about 443.8598206799.

The spelling of 87445507 in words is "eighty-seven million, four hundred forty-five thousand, five hundred seven".