87709797 has 20 divisors (see below), whose sum is σ = 149741856. Its totient is φ = 50119560.

The previous prime is 87709771. The next prime is 87709807. The reversal of 87709797 is 79790778.

It is not a de Polignac number, because 87709797 - 2¹⁰ = 87708773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87709747) 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 19 ways as a sum of consecutive naturals, for example, 76779 + ... + 77912.

Almost surely, 2^87709797 is an apocalyptic number.

It is an amenable number.

87709797 is a deficient number, since it is larger than the sum of its proper divisors (62032059).

87709797 is a wasteful number, since it uses less digits than its factorization.

87709797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154710 (or 154701 counting only the distinct ones).

The product of its (nonzero) digits is 1555848, while the sum is 54.

The square root of 87709797 is about 9365.3508743666. The cubic root of 87709797 is about 444.3065359460.

The spelling of 87709797 in words is "eighty-seven million, seven hundred nine thousand, seven hundred ninety-seven".