42391963 has 2 divisors, whose sum is σ = 42391964. Its totient is φ = 42391962.

The previous prime is 42391961. The next prime is 42391969. The reversal of 42391963 is 36919324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42391963 - 2¹ = 42391961 is a prime.

Together with 42391961, it forms a pair of twin primes.

It is a plaindrome in base 12.

It is not a weakly prime, because it can be changed into another prime (42391961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21195981 + 21195982.

It is an arithmetic number, because the mean of its divisors is an integer number (21195982).

Almost surely, 2^42391963 is an apocalyptic number.

42391963 is a deficient number, since it is larger than the sum of its proper divisors (1).

42391963 is an equidigital number, since it uses as much as digits as its factorization.

42391963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 42391963 is about 6510.9110729605. The cubic root of 42391963 is about 348.6806464438.

The spelling of 42391963 in words is "forty-two million, three hundred ninety-one thousand, nine hundred sixty-three".