42403189 has 2 divisors, whose sum is σ = 42403190. Its totient is φ = 42403188.

The previous prime is 42403177. The next prime is 42403213. The reversal of 42403189 is 98130424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41667025 + 736164 = 6455^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 42403189 - 2¹⁹ = 41878901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42403189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42403129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21201594 + 21201595.

It is an arithmetic number, because the mean of its divisors is an integer number (21201595).

Almost surely, 2^42403189 is an apocalyptic number.

It is an amenable number.

42403189 is a deficient number, since it is larger than the sum of its proper divisors (1).

42403189 is an equidigital number, since it uses as much as digits as its factorization.

42403189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 42403189 is about 6511.7731072266. The cubic root of 42403189 is about 348.7114222732.

The spelling of 42403189 in words is "forty-two million, four hundred three thousand, one hundred eighty-nine".