87840573 has 8 divisors (see below), whose sum is σ = 119977536. Its totient is φ = 57132000.

The previous prime is 87840569. The next prime is 87840583. The reversal of 87840573 is 37504878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87840573 - 2² = 87840569 is a prime.

It is a super-3 number, since 3×87840573³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87840503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356953 + ... + 357198.

It is an arithmetic number, because the mean of its divisors is an integer number (14997192).

Almost surely, 2^87840573 is an apocalyptic number.

It is an amenable number.

87840573 is a deficient number, since it is larger than the sum of its proper divisors (32136963).

87840573 is a wasteful number, since it uses less digits than its factorization.

87840573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714195.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 87840573 is about 9372.3301798432. The cubic root of 87840573 is about 444.5272478059.

The spelling of 87840573 in words is "eighty-seven million, eight hundred forty thousand, five hundred seventy-three".