42633729 has 8 divisors (see below), whose sum is σ = 63161120. Its totient is φ = 28422468.

The previous prime is 42633719. The next prime is 42633737. The reversal of 42633729 is 92733624.

It is a happy number.

It is not a de Polignac number, because 42633729 - 2¹¹ = 42631681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42633693 and 42633702.

It is not an unprimeable number, because it can be changed into a prime (42633719) 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, 789487 + ... + 789540.

It is an arithmetic number, because the mean of its divisors is an integer number (7895140).

Almost surely, 2^42633729 is an apocalyptic number.

It is an amenable number.

42633729 is a deficient number, since it is larger than the sum of its proper divisors (20527391).

42633729 is a wasteful number, since it uses less digits than its factorization.

42633729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579036 (or 1579030 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 42633729 is about 6529.4508957492. The cubic root of 42633729 is about 349.3422449272.

The spelling of 42633729 in words is "forty-two million, six hundred thirty-three thousand, seven hundred twenty-nine".