42697042639 has 2 divisors, whose sum is σ = 42697042640. Its totient is φ = 42697042638.

The previous prime is 42697042621. The next prime is 42697042709. The reversal of 42697042639 is 93624079624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42697042639 - 2¹⁵ = 42697009871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42697042939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21348521319 + 21348521320.

It is an arithmetic number, because the mean of its divisors is an integer number (21348521320).

Almost surely, 2^42697042639 is an apocalyptic number.

42697042639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42697042639 is an equidigital number, since it uses as much as digits as its factorization.

42697042639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 42697042639 in words is "forty-two billion, six hundred ninety-seven million, forty-two thousand, six hundred thirty-nine".