42944491 has 2 divisors, whose sum is σ = 42944492. Its totient is φ = 42944490.

The previous prime is 42944483. The next prime is 42944497. The reversal of 42944491 is 19444924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42944491 - 2³ = 42944483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42944491.

It is not a weakly prime, because it can be changed into another prime (42944497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21472245 + 21472246.

It is an arithmetic number, because the mean of its divisors is an integer number (21472246).

Almost surely, 2^42944491 is an apocalyptic number.

42944491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42944491 is an equidigital number, since it uses as much as digits as its factorization.

42944491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 42944491 is about 6553.2046359014. The cubic root of 42944491 is about 350.1889890899.

The spelling of 42944491 in words is "forty-two million, nine hundred forty-four thousand, four hundred ninety-one".