87747755 has 4 divisors (see below), whose sum is σ = 105297312. Its totient is φ = 70198200.

The previous prime is 87747733. The next prime is 87747773. The reversal of 87747755 is 55774778.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55774778 = 2 ⋅27887389.

It is not a de Polignac number, because 87747755 - 2¹² = 87743659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8774771 + ... + 8774780.

It is an arithmetic number, because the mean of its divisors is an integer number (26324328).

Almost surely, 2^87747755 is an apocalyptic number.

87747755 is a deficient number, since it is larger than the sum of its proper divisors (17549557).

87747755 is a wasteful number, since it uses less digits than its factorization.

87747755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17549556.

The product of its digits is 1920800, while the sum is 50.

The square root of 87747755 is about 9367.3771675961. The cubic root of 87747755 is about 444.3706205971.

The spelling of 87747755 in words is "eighty-seven million, seven hundred forty-seven thousand, seven hundred fifty-five".