87434921 has 8 divisors (see below), whose sum is σ = 100192320. Its totient is φ = 74744208.

The previous prime is 87434917. The next prime is 87434929. The reversal of 87434921 is 12943478.

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

It is not a de Polignac number, because 87434921 - 2² = 87434917 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87434929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13826 + ... + 19131.

It is an arithmetic number, because the mean of its divisors is an integer number (12524040).

Almost surely, 2^87434921 is an apocalyptic number.

It is an amenable number.

87434921 is a deficient number, since it is larger than the sum of its proper divisors (12757399).

87434921 is a wasteful number, since it uses less digits than its factorization.

87434921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33343.

The product of its digits is 48384, while the sum is 38.

The square root of 87434921 is about 9350.6642010073. The cubic root of 87434921 is about 443.8419089928.

The spelling of 87434921 in words is "eighty-seven million, four hundred thirty-four thousand, nine hundred twenty-one".