87025779 has 16 divisors (see below), whose sum is σ = 129111840. Its totient is φ = 57934080.

The previous prime is 87025777. The next prime is 87025787. The reversal of 87025779 is 97752078.

87025779 is a `hidden beast` number, since 8 + 70 + 2 + 577 + 9 = 666.

It is not a de Polignac number, because 87025779 - 2¹ = 87025777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87025777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21259 + ... + 25019.

It is an arithmetic number, because the mean of its divisors is an integer number (8069490).

Almost surely, 2^87025779 is an apocalyptic number.

87025779 is a deficient number, since it is larger than the sum of its proper divisors (42086061).

87025779 is a wasteful number, since it uses less digits than its factorization.

87025779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627 (or 4621 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The square root of 87025779 is about 9328.7608501880. The cubic root of 87025779 is about 443.1485233556.

The spelling of 87025779 in words is "eighty-seven million, twenty-five thousand, seven hundred seventy-nine".