87470829 has 12 divisors (see below), whose sum is σ = 128731356. Its totient is φ = 57213312.

The previous prime is 87470821. The next prime is 87470833. The reversal of 87470829 is 92807478.

It can be written as a sum of positive squares in 2 ways, for example, as 24029604 + 63441225 = 4902^2 + 7965^2 .

It is not a de Polignac number, because 87470829 - 2³ = 87470821 is a prime.

It is a super-3 number, since 3×87470829³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87470821) 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, 91212 + ... + 92165.

It is an arithmetic number, because the mean of its divisors is an integer number (10727613).

Almost surely, 2^87470829 is an apocalyptic number.

It is an amenable number.

87470829 is a deficient number, since it is larger than the sum of its proper divisors (41260527).

87470829 is a wasteful number, since it uses less digits than its factorization.

87470829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183436 (or 183433 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 87470829 is about 9352.5840814184. The cubic root of 87470829 is about 443.9026600589.

The spelling of 87470829 in words is "eighty-seven million, four hundred seventy thousand, eight hundred twenty-nine".