87771801 has 8 divisors (see below), whose sum is σ = 126031360. Its totient is φ = 54013392.

The previous prime is 87771797. The next prime is 87771821. The reversal of 87771801 is 10817778.

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

It is not a de Polignac number, because 87771801 - 2² = 87771797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 2250559 = 87771801 / (8 + 7 + 7 + 7 + 1 + 8 + 0 + 1).

It is a self number, because there is not a number n which added to its sum of digits gives 87771801.

It is not an unprimeable number, because it can be changed into a prime (87771821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125241 + ... + 1125318.

It is an arithmetic number, because the mean of its divisors is an integer number (15753920).

Almost surely, 2^87771801 is an apocalyptic number.

It is an amenable number.

87771801 is a deficient number, since it is larger than the sum of its proper divisors (38259559).

87771801 is a wasteful number, since it uses less digits than its factorization.

87771801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250575.

The product of its (nonzero) digits is 21952, while the sum is 39.

The square root of 87771801 is about 9368.6605766246. The cubic root of 87771801 is about 444.4112079984.

The spelling of 87771801 in words is "eighty-seven million, seven hundred seventy-one thousand, eight hundred one".