87424791 has 8 divisors (see below), whose sum is σ = 116653680. Its totient is φ = 58239552.

The previous prime is 87424781. The next prime is 87424793. The reversal of 87424791 is 19742478.

It is a happy number.

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

It is not a de Polignac number, because 87424791 - 2⁹ = 87424279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87424793) 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, 5910 + ... + 14483.

It is an arithmetic number, because the mean of its divisors is an integer number (14581710).

Almost surely, 2^87424791 is an apocalyptic number.

87424791 is a deficient number, since it is larger than the sum of its proper divisors (29228889).

87424791 is a wasteful number, since it uses less digits than its factorization.

87424791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21825.

The product of its digits is 112896, while the sum is 42.

The square root of 87424791 is about 9350.1225125663. The cubic root of 87424791 is about 443.8247675115.

The spelling of 87424791 in words is "eighty-seven million, four hundred twenty-four thousand, seven hundred ninety-one".