42382979 has 2 divisors, whose sum is σ = 42382980. Its totient is φ = 42382978.

The previous prime is 42382973. The next prime is 42382981. The reversal of 42382979 is 97928324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42382979 is a prime.

Together with 42382981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42382973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21191489 + 21191490.

It is an arithmetic number, because the mean of its divisors is an integer number (21191490).

Almost surely, 2^42382979 is an apocalyptic number.

42382979 is a deficient number, since it is larger than the sum of its proper divisors (1).

42382979 is an equidigital number, since it uses as much as digits as its factorization.

42382979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 42382979 is about 6510.2211175965. The cubic root of 42382979 is about 348.6560130933.

The spelling of 42382979 in words is "forty-two million, three hundred eighty-two thousand, nine hundred seventy-nine".