87730071 has 32 divisors (see below), whose sum is σ = 141163008. Its totient is φ = 47744640.

The previous prime is 87730063. The next prime is 87730079. The reversal of 87730071 is 17003778.

It is an interprime number because it is at equal distance from previous prime (87730063) and next prime (87730079).

It is not a de Polignac number, because 87730071 - 2³ = 87730063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87730079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13110 + ... + 18636.

It is an arithmetic number, because the mean of its divisors is an integer number (4411344).

Almost surely, 2^87730071 is an apocalyptic number.

87730071 is a deficient number, since it is larger than the sum of its proper divisors (53432937).

87730071 is a wasteful number, since it uses less digits than its factorization.

87730071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5591.

The product of its (nonzero) digits is 8232, while the sum is 33.

The square root of 87730071 is about 9366.4332058687. The cubic root of 87730071 is about 444.3407669254.

The spelling of 87730071 in words is "eighty-seven million, seven hundred thirty thousand, seventy-one".