42993687 has 8 divisors (see below), whose sum is σ = 62536320. Its totient is φ = 26056760.

The previous prime is 42993661. The next prime is 42993701. The reversal of 42993687 is 78639924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42993687 - 2¹⁸ = 42731543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42993607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 651387 + ... + 651452.

It is an arithmetic number, because the mean of its divisors is an integer number (7817040).

Almost surely, 2^42993687 is an apocalyptic number.

42993687 is a deficient number, since it is larger than the sum of its proper divisors (19542633).

42993687 is a wasteful number, since it uses less digits than its factorization.

42993687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302853.

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

The square root of 42993687 is about 6556.9571448958. The cubic root of 42993687 is about 350.3226602756.

The spelling of 42993687 in words is "forty-two million, nine hundred ninety-three thousand, six hundred eighty-seven".