42940663 has 2 divisors, whose sum is σ = 42940664. Its totient is φ = 42940662.

The previous prime is 42940633. The next prime is 42940679. The reversal of 42940663 is 36604924.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42940663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42940603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21470331 + 21470332.

It is an arithmetic number, because the mean of its divisors is an integer number (21470332).

Almost surely, 2^42940663 is an apocalyptic number.

42940663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42940663 is an equidigital number, since it uses as much as digits as its factorization.

42940663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 42940663 is about 6552.9125585498. The cubic root of 42940663 is about 350.1785836940.

The spelling of 42940663 in words is "forty-two million, nine hundred forty thousand, six hundred sixty-three".