42931973 has 4 divisors (see below), whose sum is σ = 49065120. Its totient is φ = 36798828.

The previous prime is 42931943. The next prime is 42931979. The reversal of 42931973 is 37913924.

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 a cyclic number.

It is not a de Polignac number, because 42931973 - 2¹² = 42927877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42931979) 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, 3066563 + ... + 3066576.

It is an arithmetic number, because the mean of its divisors is an integer number (12266280).

Almost surely, 2^42931973 is an apocalyptic number.

It is an amenable number.

42931973 is a deficient number, since it is larger than the sum of its proper divisors (6133147).

42931973 is an equidigital number, since it uses as much as digits as its factorization.

42931973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133146.

The product of its digits is 40824, while the sum is 38.

The square root of 42931973 is about 6552.2494610630. The cubic root of 42931973 is about 350.1549599539.

The spelling of 42931973 in words is "forty-two million, nine hundred thirty-one thousand, nine hundred seventy-three".