87403501 has 2 divisors, whose sum is σ = 87403502. Its totient is φ = 87403500.

The previous prime is 87403493. The next prime is 87403523. The reversal of 87403501 is 10530478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85581001 + 1822500 = 9251^2 + 1350^2 .

It is a cyclic number.

It is not a de Polignac number, because 87403501 - 2³ = 87403493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87403501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87443501) 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, 43701750 + 43701751.

It is an arithmetic number, because the mean of its divisors is an integer number (43701751).

Almost surely, 2^87403501 is an apocalyptic number.

It is an amenable number.

87403501 is a deficient number, since it is larger than the sum of its proper divisors (1).

87403501 is an equidigital number, since it uses as much as digits as its factorization.

87403501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 87403501 is about 9348.9839554895. The cubic root of 87403501 is about 443.7887373179.

Adding to 87403501 its reverse (10530478), we get a palindrome (97933979).

The spelling of 87403501 in words is "eighty-seven million, four hundred three thousand, five hundred one".