87905761 has 4 divisors (see below), whose sum is σ = 92532400. Its totient is φ = 83279124.

The previous prime is 87905731. The next prime is 87905767. The reversal of 87905761 is 16750978.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16750978 = 2 ⋅8375489.

It is a cyclic number.

It is not a de Polignac number, because 87905761 - 2⁷ = 87905633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87905767) 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, 2313291 + ... + 2313328.

It is an arithmetic number, because the mean of its divisors is an integer number (23133100).

Almost surely, 2^87905761 is an apocalyptic number.

It is an amenable number.

87905761 is a deficient number, since it is larger than the sum of its proper divisors (4626639).

87905761 is a wasteful number, since it uses less digits than its factorization.

87905761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626638.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 87905761 is about 9375.8072185812. The cubic root of 87905761 is about 444.6371843872.

The spelling of 87905761 in words is "eighty-seven million, nine hundred five thousand, seven hundred sixty-one".