87751725 has 12 divisors (see below), whose sum is σ = 145082976. Its totient is φ = 46800880.

The previous prime is 87751723. The next prime is 87751757. The reversal of 87751725 is 52715778.

It is not a de Polignac number, because 87751725 - 2¹ = 87751723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87751723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 584937 + ... + 585086.

It is an arithmetic number, because the mean of its divisors is an integer number (12090248).

Almost surely, 2^87751725 is an apocalyptic number.

It is an amenable number.

87751725 is a deficient number, since it is larger than the sum of its proper divisors (57331251).

87751725 is a wasteful number, since it uses less digits than its factorization.

87751725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170036 (or 1170031 counting only the distinct ones).

The product of its digits is 137200, while the sum is 42.

The square root of 87751725 is about 9367.5890708335. The cubic root of 87751725 is about 444.3773220971.

The spelling of 87751725 in words is "eighty-seven million, seven hundred fifty-one thousand, seven hundred twenty-five".