42969731 has 8 divisors (see below), whose sum is σ = 49192800. Its totient is φ = 36767808.

The previous prime is 42969721. The next prime is 42969733. The reversal of 42969731 is 13796924.

42969731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-42969731 is a prime.

It is a super-2 number, since 2×42969731² = 3692795564424722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42969733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656 + ... + 9293.

It is an arithmetic number, because the mean of its divisors is an integer number (6149100).

Almost surely, 2^42969731 is an apocalyptic number.

42969731 is a deficient number, since it is larger than the sum of its proper divisors (6223069).

42969731 is an equidigital number, since it uses as much as digits as its factorization.

42969731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10573.

The product of its digits is 81648, while the sum is 41.

The square root of 42969731 is about 6555.1301283804. The cubic root of 42969731 is about 350.2575818152.

The spelling of 42969731 in words is "forty-two million, nine hundred sixty-nine thousand, seven hundred thirty-one".