42993317 has 2 divisors, whose sum is σ = 42993318. Its totient is φ = 42993316.

The previous prime is 42993299. The next prime is 42993361. The reversal of 42993317 is 71339924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41550916 + 1442401 = 6446^2 + 1201^2 .

It is a cyclic number.

It is not a de Polignac number, because 42993317 - 2⁸ = 42993061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42993397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21496658 + 21496659.

It is an arithmetic number, because the mean of its divisors is an integer number (21496659).

Almost surely, 2^42993317 is an apocalyptic number.

It is an amenable number.

42993317 is a deficient number, since it is larger than the sum of its proper divisors (1).

42993317 is an equidigital number, since it uses as much as digits as its factorization.

42993317 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42993317 is about 6556.9289305284. The cubic root of 42993317 is about 350.3216553237.

The spelling of 42993317 in words is "forty-two million, nine hundred ninety-three thousand, three hundred seventeen".