42491963 has 4 divisors (see below), whose sum is σ = 42505008. Its totient is φ = 42478920.

The previous prime is 42491927. The next prime is 42492019. The reversal of 42491963 is 36919424.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42491963 - 2⁶ = 42491899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42496963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2945 + ... + 9677.

It is an arithmetic number, because the mean of its divisors is an integer number (10626252).

Almost surely, 2^42491963 is an apocalyptic number.

42491963 is a deficient number, since it is larger than the sum of its proper divisors (13045).

42491963 is an equidigital number, since it uses as much as digits as its factorization.

42491963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13044.

The product of its digits is 46656, while the sum is 38.

The square root of 42491963 is about 6518.5859662967. The cubic root of 42491963 is about 348.9546031159.

The spelling of 42491963 in words is "forty-two million, four hundred ninety-one thousand, nine hundred sixty-three".