42938987 has 16 divisors (see below), whose sum is σ = 53027520. Its totient is φ = 33858432.

The previous prime is 42938977. The next prime is 42939007. The reversal of 42938987 is 78983924.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42938987 - 2¹⁰ = 42937963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42938947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34793 + ... + 36005.

It is an arithmetic number, because the mean of its divisors is an integer number (3314220).

Almost surely, 2^42938987 is an apocalyptic number.

42938987 is a deficient number, since it is larger than the sum of its proper divisors (10088533).

42938987 is a wasteful number, since it uses less digits than its factorization.

42938987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622.

The product of its digits is 870912, while the sum is 50.

The square root of 42938987 is about 6552.7846752354. The cubic root of 42938987 is about 350.1740277409.

The spelling of 42938987 in words is "forty-two million, nine hundred thirty-eight thousand, nine hundred eighty-seven".