86993938 has 4 divisors (see below), whose sum is σ = 130490910. Its totient is φ = 43496968.

The previous prime is 86993911. The next prime is 86993953. The reversal of 86993938 is 83939968.

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

It can be written as a sum of positive squares in only one way, i.e., 85618009 + 1375929 = 9253^2 + 1173^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21748483 + ... + 21748486.

Almost surely, 2^86993938 is an apocalyptic number.

86993938 is a deficient number, since it is larger than the sum of its proper divisors (43496972).

86993938 is a wasteful number, since it uses less digits than its factorization.

86993938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43496971.

The product of its digits is 2519424, while the sum is 55.

The square root of 86993938 is about 9327.0540901187. The cubic root of 86993938 is about 443.0944703553.

The spelling of 86993938 in words is "eighty-six million, nine hundred ninety-three thousand, nine hundred thirty-eight".