42958021979 has 2 divisors, whose sum is σ = 42958021980. Its totient is φ = 42958021978.

The previous prime is 42958021927. The next prime is 42958021991. The reversal of 42958021979 is 97912085924.

42958021979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42958021979 is a prime.

It is not a weakly prime, because it can be changed into another prime (42958021279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21479010989 + 21479010990.

It is an arithmetic number, because the mean of its divisors is an integer number (21479010990).

Almost surely, 2^42958021979 is an apocalyptic number.

42958021979 is a deficient number, since it is larger than the sum of its proper divisors (1).

42958021979 is an equidigital number, since it uses as much as digits as its factorization.

42958021979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 56.

The spelling of 42958021979 in words is "forty-two billion, nine hundred fifty-eight million, twenty-one thousand, nine hundred seventy-nine".