442777679 has 2 divisors, whose sum is σ = 442777680. Its totient is φ = 442777678.

The previous prime is 442777667. The next prime is 442777697. The reversal of 442777679 is 976777244.

Together with next prime (442777697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442777679 - 2¹⁶ = 442712143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442777679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442777609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221388839 + 221388840.

It is an arithmetic number, because the mean of its divisors is an integer number (221388840).

Almost surely, 2^442777679 is an apocalyptic number.

442777679 is a deficient number, since it is larger than the sum of its proper divisors (1).

442777679 is an equidigital number, since it uses as much as digits as its factorization.

442777679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 53.

The square root of 442777679 is about 21042.2831223230. The cubic root of 442777679 is about 762.1876482544.

The spelling of 442777679 in words is "four hundred forty-two million, seven hundred seventy-seven thousand, six hundred seventy-nine".