42458993 has 2 divisors, whose sum is σ = 42458994. Its totient is φ = 42458992.

The previous prime is 42458971. The next prime is 42459019. The reversal of 42458993 is 39985424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33500944 + 8958049 = 5788^2 + 2993^2 .

It is a cyclic number.

It is not a de Polignac number, because 42458993 - 2¹² = 42454897 is a prime.

It is not a weakly prime, because it can be changed into another prime (42458393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21229496 + 21229497.

It is an arithmetic number, because the mean of its divisors is an integer number (21229497).

Almost surely, 2^42458993 is an apocalyptic number.

It is an amenable number.

42458993 is a deficient number, since it is larger than the sum of its proper divisors (1).

42458993 is an equidigital number, since it uses as much as digits as its factorization.

42458993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 42458993 is about 6516.0565528546. The cubic root of 42458993 is about 348.8643271408.

The spelling of 42458993 in words is "forty-two million, four hundred fifty-eight thousand, nine hundred ninety-three".