87777241 has 4 divisors (see below), whose sum is σ = 88366500. Its totient is φ = 87187984.

The previous prime is 87777227. The next prime is 87777251. The reversal of 87777241 is 14277778.

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 5040025 + 82737216 = 2245^2 + 9096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87777241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87777251) 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, 294406 + ... + 294703.

It is an arithmetic number, because the mean of its divisors is an integer number (22091625).

Almost surely, 2^87777241 is an apocalyptic number.

It is an amenable number.

87777241 is a deficient number, since it is larger than the sum of its proper divisors (589259).

87777241 is a wasteful number, since it uses less digits than its factorization.

87777241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589258.

The product of its digits is 153664, while the sum is 43.

The square root of 87777241 is about 9368.9509017819. The cubic root of 87777241 is about 444.4203891818.

The spelling of 87777241 in words is "eighty-seven million, seven hundred seventy-seven thousand, two hundred forty-one".