42399473 has 2 divisors, whose sum is σ = 42399474. Its totient is φ = 42399472.

The previous prime is 42399457. The next prime is 42399481. The reversal of 42399473 is 37499324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34492129 + 7907344 = 5873^2 + 2812^2 .

It is a cyclic number.

It is not a de Polignac number, because 42399473 - 2⁴ = 42399457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42399473.

It is not a weakly prime, because it can be changed into another prime (42399403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21199736 + 21199737.

It is an arithmetic number, because the mean of its divisors is an integer number (21199737).

Almost surely, 2^42399473 is an apocalyptic number.

It is an amenable number.

42399473 is a deficient number, since it is larger than the sum of its proper divisors (1).

42399473 is an equidigital number, since it uses as much as digits as its factorization.

42399473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 41.

The square root of 42399473 is about 6511.4877716233. The cubic root of 42399473 is about 348.7012355433.

The spelling of 42399473 in words is "forty-two million, three hundred ninety-nine thousand, four hundred seventy-three".