86779001 has 4 divisors (see below), whose sum is σ = 88895604. Its totient is φ = 84662400.

The previous prime is 86778997. The next prime is 86779009. The reversal of 86779001 is 10097768.

It is a happy number.

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 6497401 + 80281600 = 2549^2 + 8960^2 .

It is a cyclic number.

It is not a de Polignac number, because 86779001 - 2² = 86778997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86779009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058240 + ... + 1058321.

It is an arithmetic number, because the mean of its divisors is an integer number (22223901).

Almost surely, 2^86779001 is an apocalyptic number.

It is an amenable number.

86779001 is a deficient number, since it is larger than the sum of its proper divisors (2116603).

86779001 is a wasteful number, since it uses less digits than its factorization.

86779001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116602.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 86779001 is about 9315.5247302554. The cubic root of 86779001 is about 442.7292497398.

The spelling of 86779001 in words is "eighty-six million, seven hundred seventy-nine thousand, one".