87993005 has 16 divisors (see below), whose sum is σ = 106991280. Its totient is φ = 69468672.

The previous prime is 87993001. The next prime is 87993019. The reversal of 87993005 is 50039978.

It can be written as a sum of positive squares in 8 ways, for example, as 139876 + 87853129 = 374^2 + 9373^2 .

It is a cyclic number.

It is not a de Polignac number, because 87993005 - 2² = 87993001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87993001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154361 + ... + 154929.

It is an arithmetic number, because the mean of its divisors is an integer number (6686955).

Almost surely, 2^87993005 is an apocalyptic number.

It is an amenable number.

87993005 is a deficient number, since it is larger than the sum of its proper divisors (18998275).

87993005 is a wasteful number, since it uses less digits than its factorization.

87993005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 87993005 is about 9380.4586774848. The cubic root of 87993005 is about 444.7842323919.

The spelling of 87993005 in words is "eighty-seven million, nine hundred ninety-three thousand, five".