42469639 has 2 divisors, whose sum is σ = 42469640. Its totient is φ = 42469638.

The previous prime is 42469633. The next prime is 42469663. The reversal of 42469639 is 93696424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42469639 - 2³ = 42469631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42469595 and 42469604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42469631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21234819 + 21234820.

It is an arithmetic number, because the mean of its divisors is an integer number (21234820).

Almost surely, 2^42469639 is an apocalyptic number.

42469639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42469639 is an equidigital number, since it uses as much as digits as its factorization.

42469639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 43.

The square root of 42469639 is about 6516.8734067803. The cubic root of 42469639 is about 348.8934823248.

The spelling of 42469639 in words is "forty-two million, four hundred sixty-nine thousand, six hundred thirty-nine".