42367729 has 2 divisors, whose sum is σ = 42367730. Its totient is φ = 42367728.

The previous prime is 42367693. The next prime is 42367747. The reversal of 42367729 is 92776324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41216400 + 1151329 = 6420^2 + 1073^2 .

It is a cyclic number.

It is not a de Polignac number, because 42367729 - 2⁷ = 42367601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42367691 and 42367700.

It is not a weakly prime, because it can be changed into another prime (42367789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21183864 + 21183865.

It is an arithmetic number, because the mean of its divisors is an integer number (21183865).

Almost surely, 2^42367729 is an apocalyptic number.

It is an amenable number.

42367729 is a deficient number, since it is larger than the sum of its proper divisors (1).

42367729 is an equidigital number, since it uses as much as digits as its factorization.

42367729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 40.

The square root of 42367729 is about 6509.0497770412. The cubic root of 42367729 is about 348.6141909424.

The spelling of 42367729 in words is "forty-two million, three hundred sixty-seven thousand, seven hundred twenty-nine".