87730993 has 16 divisors (see below), whose sum is σ = 106350336. Its totient is φ = 70741440.

The previous prime is 87730991. The next prime is 87730997. The reversal of 87730993 is 39903778.

It is not a de Polignac number, because 87730993 - 2¹ = 87730991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87730991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5355 + ... + 14287.

It is an arithmetic number, because the mean of its divisors is an integer number (6646896).

Almost surely, 2^87730993 is an apocalyptic number.

It is an amenable number.

87730993 is a deficient number, since it is larger than the sum of its proper divisors (18619343).

87730993 is a wasteful number, since it uses less digits than its factorization.

87730993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9024.

The product of its (nonzero) digits is 285768, while the sum is 46.

The square root of 87730993 is about 9366.4824240480. The cubic root of 87730993 is about 444.3423235211.

The spelling of 87730993 in words is "eighty-seven million, seven hundred thirty thousand, nine hundred ninety-three".