87399403 has 16 divisors (see below), whose sum is σ = 107805376. Its totient is φ = 68999040.

The previous prime is 87399383. The next prime is 87399421. The reversal of 87399403 is 30499378.

It is a cyclic number.

It is not a de Polignac number, because 87399403 - 2²¹ = 85302251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87399403.

It is not an unprimeable number, because it can be changed into a prime (87399463) 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 in 15 ways as a sum of consecutive naturals, for example, 59425 + ... + 60877.

It is an arithmetic number, because the mean of its divisors is an integer number (6737836).

Almost surely, 2^87399403 is an apocalyptic number.

87399403 is a deficient number, since it is larger than the sum of its proper divisors (20405973).

87399403 is a wasteful number, since it uses less digits than its factorization.

87399403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 87399403 is about 9348.7647847189. The cubic root of 87399403 is about 443.7818013842.

The spelling of 87399403 in words is "eighty-seven million, three hundred ninety-nine thousand, four hundred three".