42343987 has 12 divisors (see below), whose sum is σ = 49619640. Its totient is φ = 36027936.

The previous prime is 42343981. The next prime is 42343997. The reversal of 42343987 is 78934324.

It is not a de Polignac number, because 42343987 - 2¹⁹ = 41819699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42343981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3703 + ... + 9919.

It is an arithmetic number, because the mean of its divisors is an integer number (4134970).

Almost surely, 2^42343987 is an apocalyptic number.

42343987 is a deficient number, since it is larger than the sum of its proper divisors (7275653).

42343987 is a wasteful number, since it uses less digits than its factorization.

42343987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370 (or 6363 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 42343987 is about 6507.2257529611. The cubic root of 42343987 is about 348.5490600448.

The spelling of 42343987 in words is "forty-two million, three hundred forty-three thousand, nine hundred eighty-seven".