42739633 has 2 divisors, whose sum is σ = 42739634. Its totient is φ = 42739632.

The previous prime is 42739601. The next prime is 42739693. The reversal of 42739633 is 33693724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 4941729 = 6148^2 + 2223^2 .

It is a cyclic number.

It is not a de Polignac number, because 42739633 - 2⁵ = 42739601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42739592 and 42739601.

It is not a weakly prime, because it can be changed into another prime (42739693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21369816 + 21369817.

It is an arithmetic number, because the mean of its divisors is an integer number (21369817).

Almost surely, 2^42739633 is an apocalyptic number.

It is an amenable number.

42739633 is a deficient number, since it is larger than the sum of its proper divisors (1).

42739633 is an equidigital number, since it uses as much as digits as its factorization.

42739633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 37.

The square root of 42739633 is about 6537.5555829377. Note that the first 4 decimals coincide. The cubic root of 42739633 is about 349.6312660876.

The spelling of 42739633 in words is "forty-two million, seven hundred thirty-nine thousand, six hundred thirty-three".