42964991 has 4 divisors (see below), whose sum is σ = 43026984. Its totient is φ = 42903000.

The previous prime is 42964963. The next prime is 42964997. The reversal of 42964991 is 19946924.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42964991 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42964997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29945 + ... + 31346.

It is an arithmetic number, because the mean of its divisors is an integer number (10756746).

Almost surely, 2^42964991 is an apocalyptic number.

42964991 is a deficient number, since it is larger than the sum of its proper divisors (61993).

42964991 is an equidigital number, since it uses as much as digits as its factorization.

42964991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61992.

The product of its digits is 139968, while the sum is 44.

The square root of 42964991 is about 6554.7685695225. The cubic root of 42964991 is about 350.2447023460.

The spelling of 42964991 in words is "forty-two million, nine hundred sixty-four thousand, nine hundred ninety-one".