87993077 has 4 divisors (see below), whose sum is σ = 88146156. Its totient is φ = 87840000.

The previous prime is 87993053. The next prime is 87993079. The reversal of 87993077 is 77039978.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57896881 + 30096196 = 7609^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 87993077 - 2¹⁰ = 87992053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87993079) 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 3 ways as a sum of consecutive naturals, for example, 75674 + ... + 76827.

It is an arithmetic number, because the mean of its divisors is an integer number (22036539).

Almost surely, 2^87993077 is an apocalyptic number.

It is an amenable number.

87993077 is a deficient number, since it is larger than the sum of its proper divisors (153079).

87993077 is a wasteful number, since it uses less digits than its factorization.

87993077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153078.

The product of its (nonzero) digits is 666792, while the sum is 50.

The square root of 87993077 is about 9380.4625152494. The cubic root of 87993077 is about 444.7843537063.

The spelling of 87993077 in words is "eighty-seven million, nine hundred ninety-three thousand, seventy-seven".