1420100779 has 2 divisors, whose sum is σ = 1420100780. Its totient is φ = 1420100778.
The previous prime is 1420100777. The next prime is 1420100783. The reversal of 1420100779 is 9770010241.
It is a weak prime.
It is an emirp because it is prime and its reverse (9770010241) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1420100779 - 21 = 1420100777 is a prime.
Together with 1420100777, it forms a pair of twin primes.
It is a self number, because there is not a number n which added to its sum of digits gives 1420100779.
It is not a weakly prime, because it can be changed into another prime (1420100777) 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, 710050389 + 710050390.
It is an arithmetic number, because the mean of its divisors is an integer number (710050390).
Almost surely, 21420100779 is an apocalyptic number.
1420100779 is a deficient number, since it is larger than the sum of its proper divisors (1).
1420100779 is an equidigital number, since it uses as much as digits as its factorization.
1420100779 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 3528, while the sum is 31.
The square root of 1420100779 is about 37684.2245375966. The cubic root of 1420100779 is about 1124.0174542846.
The spelling of 1420100779 in words is "one billion, four hundred twenty million, one hundred thousand, seven hundred seventy-nine".
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