42974747 has 2 divisors, whose sum is σ = 42974748. Its totient is φ = 42974746.

The previous prime is 42974719. The next prime is 42974749. The reversal of 42974747 is 74747924.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42974747 is a prime.

Together with 42974749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42974698 and 42974707.

It is not a weakly prime, because it can be changed into another prime (42974749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21487373 + 21487374.

It is an arithmetic number, because the mean of its divisors is an integer number (21487374).

Almost surely, 2^42974747 is an apocalyptic number.

42974747 is a deficient number, since it is larger than the sum of its proper divisors (1).

42974747 is an equidigital number, since it uses as much as digits as its factorization.

42974747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 44.

The square root of 42974747 is about 6555.5127183158. The cubic root of 42974747 is about 350.2712101968.

The spelling of 42974747 in words is "forty-two million, nine hundred seventy-four thousand, seven hundred forty-seven".