42979379 has 2 divisors, whose sum is σ = 42979380. Its totient is φ = 42979378.

The previous prime is 42979367. The next prime is 42979381. The reversal of 42979379 is 97397924.

42979379 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-42979379 is a prime.

It is a super-3 number, since 3×42979379³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 42979381, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 9.

It is not a weakly prime, because it can be changed into another prime (42979399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21489689 + 21489690.

It is an arithmetic number, because the mean of its divisors is an integer number (21489690).

Almost surely, 2^42979379 is an apocalyptic number.

42979379 is a deficient number, since it is larger than the sum of its proper divisors (1).

42979379 is an equidigital number, since it uses as much as digits as its factorization.

42979379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 50.

The square root of 42979379 is about 6555.8659992407. The cubic root of 42979379 is about 350.2837943156.

The spelling of 42979379 in words is "forty-two million, nine hundred seventy-nine thousand, three hundred seventy-nine".