42987693 has 16 divisors (see below), whose sum is σ = 65630720. Its totient is φ = 24517296.

The previous prime is 42987691. The next prime is 42987701. The reversal of 42987693 is 39678924.

It is not a de Polignac number, because 42987693 - 2¹ = 42987691 is a prime.

It is the 6557-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42987691) by changing a digit.

It is a nontrivial repunit in base 6556.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11346 + ... + 14652.

It is an arithmetic number, because the mean of its divisors is an integer number (4101920).

Almost surely, 2^42987693 is an apocalyptic number.

It is an amenable number.

42987693 is a deficient number, since it is larger than the sum of its proper divisors (22643027).

42987693 is a wasteful number, since it uses less digits than its factorization.

42987693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3936.

The product of its digits is 653184, while the sum is 48.

The square root of 42987693 is about 6556.5000571951. The cubic root of 42987693 is about 350.3063793456.

The spelling of 42987693 in words is "forty-two million, nine hundred eighty-seven thousand, six hundred ninety-three".