42879390320623 has 2 divisors, whose sum is σ = 42879390320624. Its totient is φ = 42879390320622.

The previous prime is 42879390320513. The next prime is 42879390320633. The reversal of 42879390320623 is 32602309397824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42879390320623 - 2¹³ = 42879390312431 is a prime.

It is a super-2 number, since 2×42879390320623² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42879390320633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439695160311 + 21439695160312.

It is an arithmetic number, because the mean of its divisors is an integer number (21439695160312).

Almost surely, 2^{42879390320623} is an apocalyptic number.

42879390320623 is a deficient number, since it is larger than the sum of its proper divisors (1).

42879390320623 is an equidigital number, since it uses as much as digits as its factorization.

42879390320623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23514624, while the sum is 58.

The spelling of 42879390320623 in words is "forty-two trillion, eight hundred seventy-nine billion, three hundred ninety million, three hundred twenty thousand, six hundred twenty-three".