42729747431 has 8 divisors (see below), whose sum is σ = 48898173984. Its totient is φ = 36577365120.

The previous prime is 42729747407. The next prime is 42729747433. The reversal of 42729747431 is 13474792724.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42729747431 is a prime.

It is a super-2 number, since 2×42729747431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42729747431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42729747433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4005350 + ... + 4016003.

It is an arithmetic number, because the mean of its divisors is an integer number (6112271748).

Almost surely, 2^42729747431 is an apocalyptic number.

42729747431 is a deficient number, since it is larger than the sum of its proper divisors (6168426553).

42729747431 is an equidigital number, since it uses as much as digits as its factorization.

42729747431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8022121.

The product of its digits is 2370816, while the sum is 50.

The spelling of 42729747431 in words is "forty-two billion, seven hundred twenty-nine million, seven hundred forty-seven thousand, four hundred thirty-one".