86991004 has 6 divisors (see below), whose sum is σ = 152234264. Its totient is φ = 43495500.

The previous prime is 86990977. The next prime is 86991007. The reversal of 86991004 is 40019968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86991007) by changing a digit.

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, 10873872 + ... + 10873879.

Almost surely, 2^86991004 is an apocalyptic number.

It is an amenable number.

86991004 is a deficient number, since it is larger than the sum of its proper divisors (65243260).

86991004 is a wasteful number, since it uses less digits than its factorization.

86991004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21747755 (or 21747753 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 86991004 is about 9326.8968044039. The cubic root of 86991004 is about 443.0894889592.

The spelling of 86991004 in words is "eighty-six million, nine hundred ninety-one thousand, four".