42995779 has 2 divisors, whose sum is σ = 42995780. Its totient is φ = 42995778.

The previous prime is 42995767. The next prime is 42995807. The reversal of 42995779 is 97759924.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42995779 - 2²³ = 34607171 is a prime.

It is not a weakly prime, because it can be changed into another prime (42915779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21497889 + 21497890.

It is an arithmetic number, because the mean of its divisors is an integer number (21497890).

Almost surely, 2^42995779 is an apocalyptic number.

42995779 is a deficient number, since it is larger than the sum of its proper divisors (1).

42995779 is an equidigital number, since it uses as much as digits as its factorization.

42995779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 52.

The square root of 42995779 is about 6557.1166681705. The cubic root of 42995779 is about 350.3283422192.

The spelling of 42995779 in words is "forty-two million, nine hundred ninety-five thousand, seven hundred seventy-nine".