87653709 has 60 divisors (see below), whose sum is σ = 154457472. Its totient is φ = 47455200.

The previous prime is 87653681. The next prime is 87653711. The reversal of 87653709 is 90735678.

It is a happy number.

It is not a de Polignac number, because 87653709 - 2⁵ = 87653677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87653789) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 2827524 + ... + 2827554.

Almost surely, 2^87653709 is an apocalyptic number.

It is an amenable number.

87653709 is a deficient number, since it is larger than the sum of its proper divisors (66803763).

87653709 is a wasteful number, since it uses less digits than its factorization.

87653709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 87653709 is about 9362.3559534980. The cubic root of 87653709 is about 444.2118084862.

It can be divided in two parts, 87 and 653709, that added together give a triangular number (653796 = T₁₁₄₃).

The spelling of 87653709 in words is "eighty-seven million, six hundred fifty-three thousand, seven hundred nine".