42739693 has 2 divisors, whose sum is σ = 42739694. Its totient is φ = 42739692.

The previous prime is 42739633. The next prime is 42739709. The reversal of 42739693 is 39693724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42159049 + 580644 = 6493^2 + 762^2 .

It is a cyclic number.

It is not a de Polignac number, because 42739693 - 2²⁵ = 9185261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42739633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21369846 + 21369847.

It is an arithmetic number, because the mean of its divisors is an integer number (21369847).

Almost surely, 2^42739693 is an apocalyptic number.

It is an amenable number.

42739693 is a deficient number, since it is larger than the sum of its proper divisors (1).

42739693 is an equidigital number, since it uses as much as digits as its factorization.

42739693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 43.

The square root of 42739693 is about 6537.5601718072. The cubic root of 42739693 is about 349.6314296974.

The spelling of 42739693 in words is "forty-two million, seven hundred thirty-nine thousand, six hundred ninety-three".