42397548979 has 2 divisors, whose sum is σ = 42397548980. Its totient is φ = 42397548978.

The previous prime is 42397548943. The next prime is 42397548983. The reversal of 42397548979 is 97984579324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42397548979 - 2³³ = 33807614387 is a prime.

It is not a weakly prime, because it can be changed into another prime (42397540979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21198774489 + 21198774490.

It is an arithmetic number, because the mean of its divisors is an integer number (21198774490).

Almost surely, 2^42397548979 is an apocalyptic number.

42397548979 is a deficient number, since it is larger than the sum of its proper divisors (1).

42397548979 is an equidigital number, since it uses as much as digits as its factorization.

42397548979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 67.

The spelling of 42397548979 in words is "forty-two billion, three hundred ninety-seven million, five hundred forty-eight thousand, nine hundred seventy-nine".