42013399 has 2 divisors, whose sum is σ = 42013400. Its totient is φ = 42013398.

The previous prime is 42013393. The next prime is 42013417. The reversal of 42013399 is 99331024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42013399 - 2⁷ = 42013271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42013399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42013393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21006699 + 21006700.

It is an arithmetic number, because the mean of its divisors is an integer number (21006700).

Almost surely, 2^42013399 is an apocalyptic number.

42013399 is a deficient number, since it is larger than the sum of its proper divisors (1).

42013399 is an equidigital number, since it uses as much as digits as its factorization.

42013399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 42013399 is about 6481.7743712659. The cubic root of 42013399 is about 347.6396250672.

The spelling of 42013399 in words is "forty-two million, thirteen thousand, three hundred ninety-nine".