87779401 has 8 divisors (see below), whose sum is σ = 90201384. Its totient is φ = 85370880.

The previous prime is 87779399. The next prime is 87779437. The reversal of 87779401 is 10497778.

It can be written as a sum of positive squares in 4 ways, for example, as 76176 + 87703225 = 276^2 + 9365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87779401 - 2¹ = 87779399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87779441) 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 in 7 ways as a sum of consecutive naturals, for example, 10641 + ... + 16993.

It is an arithmetic number, because the mean of its divisors is an integer number (11275173).

Almost surely, 2^87779401 is an apocalyptic number.

It is an amenable number.

87779401 is a deficient number, since it is larger than the sum of its proper divisors (2421983).

87779401 is a wasteful number, since it uses less digits than its factorization.

87779401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6731.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 87779401 is about 9369.0661754521. The cubic root of 87779401 is about 444.4240345465.

The spelling of 87779401 in words is "eighty-seven million, seven hundred seventy-nine thousand, four hundred one".