42019403 has 2 divisors, whose sum is σ = 42019404. Its totient is φ = 42019402.

The previous prime is 42019379. The next prime is 42019409. The reversal of 42019403 is 30491024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42019403 - 2⁶ = 42019339 is a prime.

It is not a weakly prime, because it can be changed into another prime (42019409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21009701 + 21009702.

It is an arithmetic number, because the mean of its divisors is an integer number (21009702).

Almost surely, 2^42019403 is an apocalyptic number.

42019403 is a deficient number, since it is larger than the sum of its proper divisors (1).

42019403 is an equidigital number, since it uses as much as digits as its factorization.

42019403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42019403 is about 6482.2374995059. The cubic root of 42019403 is about 347.6561842994.

The spelling of 42019403 in words is "forty-two million, nineteen thousand, four hundred three".