42786379 has 2 divisors, whose sum is σ = 42786380. Its totient is φ = 42786378.

The previous prime is 42786377. The next prime is 42786383. The reversal of 42786379 is 97368724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42786379 - 2¹ = 42786377 is a prime.

Together with 42786377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42786377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21393189 + 21393190.

It is an arithmetic number, because the mean of its divisors is an integer number (21393190).

Almost surely, 2^42786379 is an apocalyptic number.

42786379 is a deficient number, since it is larger than the sum of its proper divisors (1).

42786379 is an equidigital number, since it uses as much as digits as its factorization.

42786379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 42786379 is about 6541.1297953794. The cubic root of 42786379 is about 349.7586880845.

The spelling of 42786379 in words is "forty-two million, seven hundred eighty-six thousand, three hundred seventy-nine".