42789001 has 2 divisors, whose sum is σ = 42789002. Its totient is φ = 42789000.

The previous prime is 42788971. The next prime is 42789011. The reversal of 42789001 is 10098724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35390601 + 7398400 = 5949^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 42789001 - 2⁷ = 42788873 is a prime.

It is not a weakly prime, because it can be changed into another prime (42789011) 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, 21394500 + 21394501.

It is an arithmetic number, because the mean of its divisors is an integer number (21394501).

Almost surely, 2^42789001 is an apocalyptic number.

It is an amenable number.

42789001 is a deficient number, since it is larger than the sum of its proper divisors (1).

42789001 is an equidigital number, since it uses as much as digits as its factorization.

42789001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 42789001 is about 6541.3302164009. The cubic root of 42789001 is about 349.7658324808.

The spelling of 42789001 in words is "forty-two million, seven hundred eighty-nine thousand, one".