42931747 has 2 divisors, whose sum is σ = 42931748. Its totient is φ = 42931746.

The previous prime is 42931723. The next prime is 42931753. The reversal of 42931747 is 74713924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42931747 - 2²³ = 34543139 is a prime.

It is not a weakly prime, because it can be changed into another prime (42931787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21465873 + 21465874.

It is an arithmetic number, because the mean of its divisors is an integer number (21465874).

Almost surely, 2^42931747 is an apocalyptic number.

42931747 is a deficient number, since it is larger than the sum of its proper divisors (1).

42931747 is an equidigital number, since it uses as much as digits as its factorization.

42931747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 37.

The square root of 42931747 is about 6552.2322150547. The cubic root of 42931747 is about 350.1543455310.

The spelling of 42931747 in words is "forty-two million, nine hundred thirty-one thousand, seven hundred forty-seven".