87769427 has 4 divisors (see below), whose sum is σ = 87805536. Its totient is φ = 87733320.

The previous prime is 87769421. The next prime is 87769441. The reversal of 87769427 is 72496778.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72496778 = 2 ⋅36248389.

It is a cyclic number.

It is not a de Polignac number, because 87769427 - 2²⁴ = 70992211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87769421) 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 3 ways as a sum of consecutive naturals, for example, 14123 + ... + 19364.

It is an arithmetic number, because the mean of its divisors is an integer number (21951384).

Almost surely, 2^87769427 is an apocalyptic number.

87769427 is a deficient number, since it is larger than the sum of its proper divisors (36109).

87769427 is a wasteful number, since it uses less digits than its factorization.

87769427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36108.

The product of its digits is 1185408, while the sum is 50.

The square root of 87769427 is about 9368.5338767600. The cubic root of 87769427 is about 444.4072012380.

The spelling of 87769427 in words is "eighty-seven million, seven hundred sixty-nine thousand, four hundred twenty-seven".