87402985 has 4 divisors (see below), whose sum is σ = 104883588. Its totient is φ = 69922384.

The previous prime is 87402949. The next prime is 87403003. The reversal of 87402985 is 58920478.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58920478 = 2 ⋅29460239.

It can be written as a sum of positive squares in 2 ways, for example, as 45373696 + 42029289 = 6736^2 + 6483^2 .

It is a cyclic number.

It is not a de Polignac number, because 87402985 - 2¹³ = 87394793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8740294 + ... + 8740303.

It is an arithmetic number, because the mean of its divisors is an integer number (26220897).

Almost surely, 2^87402985 is an apocalyptic number.

It is an amenable number.

87402985 is a deficient number, since it is larger than the sum of its proper divisors (17480603).

87402985 is a wasteful number, since it uses less digits than its factorization.

87402985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17480602.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 87402985 is about 9348.9563588670. The cubic root of 87402985 is about 443.7878639912.

The spelling of 87402985 in words is "eighty-seven million, four hundred two thousand, nine hundred eighty-five".