42378973 has 12 divisors (see below), whose sum is σ = 53090940. Its totient is φ = 33530112.

The previous prime is 42378971. The next prime is 42378979. The reversal of 42378973 is 37987324.

It can be written as a sum of positive squares in 2 ways, for example, as 20448484 + 21930489 = 4522^2 + 4683^2 .

It is not a de Polignac number, because 42378973 - 2¹ = 42378971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42378971) 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, 32628 + ... + 33901.

It is an arithmetic number, because the mean of its divisors is an integer number (4424245).

Almost surely, 2^42378973 is an apocalyptic number.

It is an amenable number.

42378973 is a deficient number, since it is larger than the sum of its proper divisors (10711967).

42378973 is a wasteful number, since it uses less digits than its factorization.

42378973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66556 (or 66549 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 42378973 is about 6509.9134402847. The cubic root of 42378973 is about 348.6450278659.

The spelling of 42378973 in words is "forty-two million, three hundred seventy-eight thousand, nine hundred seventy-three".