39420743 has 2 divisors, whose sum is σ = 39420744. Its totient is φ = 39420742.

The previous prime is 39420737. The next prime is 39420751. The reversal of 39420743 is 34702493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39420743 - 2⁴ = 39420727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39420793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19710371 + 19710372.

It is an arithmetic number, because the mean of its divisors is an integer number (19710372).

Almost surely, 2^39420743 is an apocalyptic number.

39420743 is a deficient number, since it is larger than the sum of its proper divisors (1).

39420743 is an equidigital number, since it uses as much as digits as its factorization.

39420743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 39420743 is about 6278.5940305135. The cubic root of 39420743 is about 340.3362964382.

The spelling of 39420743 in words is "thirty-nine million, four hundred twenty thousand, seven hundred forty-three".