87475791 has 16 divisors (see below), whose sum is σ = 132218240. Its totient is φ = 50997600.

The previous prime is 87475771. The next prime is 87475793. The reversal of 87475791 is 19757478.

It is not a de Polignac number, because 87475791 - 2¹³ = 87467599 is a prime.

It is a super-2 number, since 2×87475791² = 15304028022151362, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87475791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87475793) 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, 58285 + ... + 59766.

It is an arithmetic number, because the mean of its divisors is an integer number (8263640).

Almost surely, 2^87475791 is an apocalyptic number.

87475791 is a deficient number, since it is larger than the sum of its proper divisors (44742449).

87475791 is a wasteful number, since it uses less digits than its factorization.

87475791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118086.

The product of its digits is 493920, while the sum is 48.

The square root of 87475791 is about 9352.8493519355. The cubic root of 87475791 is about 443.9110537272.

The spelling of 87475791 in words is "eighty-seven million, four hundred seventy-five thousand, seven hundred ninety-one".