42013393 has 2 divisors, whose sum is σ = 42013394. Its totient is φ = 42013392.

The previous prime is 42013343. The next prime is 42013399. The reversal of 42013393 is 39331024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40030929 + 1982464 = 6327^2 + 1408^2 .

It is a cyclic number.

It is not a de Polignac number, because 42013393 - 2²¹ = 39916241 is a prime.

It is not a weakly prime, because it can be changed into another prime (42013399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006696 + 21006697.

It is an arithmetic number, because the mean of its divisors is an integer number (21006697).

Almost surely, 2^42013393 is an apocalyptic number.

It is an amenable number.

42013393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42013393 is an equidigital number, since it uses as much as digits as its factorization.

42013393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 42013393 is about 6481.7739084297. The cubic root of 42013393 is about 347.6396085182.

The spelling of 42013393 in words is "forty-two million, thirteen thousand, three hundred ninety-three".