42473729 has 2 divisors, whose sum is σ = 42473730. Its totient is φ = 42473728.

The previous prime is 42473713. The next prime is 42473741. The reversal of 42473729 is 92737424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42250000 + 223729 = 6500^2 + 473^2 .

It is a cyclic number.

It is not a de Polignac number, because 42473729 - 2⁴ = 42473713 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42473692 and 42473701.

It is not a weakly prime, because it can be changed into another prime (42473789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21236864 + 21236865.

It is an arithmetic number, because the mean of its divisors is an integer number (21236865).

Almost surely, 2^42473729 is an apocalyptic number.

It is an amenable number.

42473729 is a deficient number, since it is larger than the sum of its proper divisors (1).

42473729 is an equidigital number, since it uses as much as digits as its factorization.

42473729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 38.

The square root of 42473729 is about 6517.1872000120. The cubic root of 42473729 is about 348.9046819219.

The spelling of 42473729 in words is "forty-two million, four hundred seventy-three thousand, seven hundred twenty-nine".