42731373 has 4 divisors (see below), whose sum is σ = 56975168. Its totient is φ = 28487580.

The previous prime is 42731371. The next prime is 42731419. The reversal of 42731373 is 37313724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42731373 - 2¹ = 42731371 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42731373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42731371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7121893 + ... + 7121898.

It is an arithmetic number, because the mean of its divisors is an integer number (14243792).

Almost surely, 2^42731373 is an apocalyptic number.

It is an amenable number.

42731373 is a deficient number, since it is larger than the sum of its proper divisors (14243795).

42731373 is a wasteful number, since it uses less digits than its factorization.

42731373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14243794.

The product of its digits is 10584, while the sum is 30.

The square root of 42731373 is about 6536.9238178213. The cubic root of 42731373 is about 349.6087410126.

The spelling of 42731373 in words is "forty-two million, seven hundred thirty-one thousand, three hundred seventy-three".