87840693 has 20 divisors (see below), whose sum is σ = 132267520. Its totient is φ = 58092552.

The previous prime is 87840691. The next prime is 87840707. The reversal of 87840693 is 39604878.

It is a happy number.

It is not a de Polignac number, because 87840693 - 2¹ = 87840691 is a prime.

It is a super-3 number, since 3×87840693³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87840691) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6018 + ... + 14556.

It is an arithmetic number, because the mean of its divisors is an integer number (6613376).

Almost surely, 2^87840693 is an apocalyptic number.

It is an amenable number.

87840693 is a deficient number, since it is larger than the sum of its proper divisors (44426827).

87840693 is a wasteful number, since it uses less digits than its factorization.

87840693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8678 (or 8669 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 87840693 is about 9372.3365816641. The cubic root of 87840693 is about 444.5274502304.

The spelling of 87840693 in words is "eighty-seven million, eight hundred forty thousand, six hundred ninety-three".