87970471 has 4 divisors (see below), whose sum is σ = 88077672. Its totient is φ = 87863272.

The previous prime is 87970453. The next prime is 87970481. The reversal of 87970471 is 17407978.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87970471 is a prime.

It is a super-3 number, since 3×87970471³ (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 (87970411) 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, 52360 + ... + 54013.

It is an arithmetic number, because the mean of its divisors is an integer number (22019418).

Almost surely, 2^87970471 is an apocalyptic number.

87970471 is a deficient number, since it is larger than the sum of its proper divisors (107201).

87970471 is a wasteful number, since it uses less digits than its factorization.

87970471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107200.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 87970471 is about 9379.2574866031. The cubic root of 87970471 is about 444.7462611025.

The spelling of 87970471 in words is "eighty-seven million, nine hundred seventy thousand, four hundred seventy-one".