87406533 has 10 divisors (see below), whose sum is σ = 130570374. Its totient is φ = 58270968.

The previous prime is 87406523. The next prime is 87406559. The reversal of 87406533 is 33560478.

It is a happy number.

87406533 is a `hidden beast` number, since 87 + 40 + 6 + 533 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44595684 + 42810849 = 6678^2 + 6543^2 .

It is not a de Polignac number, because 87406533 - 2¹² = 87402437 is a prime.

It is a super-3 number, since 3×87406533³ (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 (87406513) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 539466 + ... + 539627.

Almost surely, 2^87406533 is an apocalyptic number.

It is an amenable number.

87406533 is a deficient number, since it is larger than the sum of its proper divisors (43163841).

87406533 is a wasteful number, since it uses less digits than its factorization.

87406533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079105 (or 1079096 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 87406533 is about 9349.1461107419. The cubic root of 87406533 is about 443.7938688892.

The spelling of 87406533 in words is "eighty-seven million, four hundred six thousand, five hundred thirty-three".