87619471 has 4 divisors (see below), whose sum is σ = 87638200. Its totient is φ = 87600744.

The previous prime is 87619463. The next prime is 87619517. The reversal of 87619471 is 17491678.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 87619471 - 2³ = 87619463 is a prime.

It is a super-3 number, since 3×87619471³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87619171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4300 + ... + 13918.

It is an arithmetic number, because the mean of its divisors is an integer number (21909550).

Almost surely, 2^87619471 is an apocalyptic number.

87619471 is a deficient number, since it is larger than the sum of its proper divisors (18729).

87619471 is an equidigital number, since it uses as much as digits as its factorization.

87619471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18728.

The product of its digits is 84672, while the sum is 43.

The square root of 87619471 is about 9360.5272821567. The cubic root of 87619471 is about 444.1539637974.

The spelling of 87619471 in words is "eighty-seven million, six hundred nineteen thousand, four hundred seventy-one".