1421695973 has 2 divisors, whose sum is σ = 1421695974. Its totient is φ = 1421695972.

The previous prime is 1421695969. The next prime is 1421696069. The reversal of 1421695973 is 3795961241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843437764 + 578258209 = 29042^2 + 24047^2 .

It is an emirp because it is prime and its reverse (3795961241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421695973 - 2² = 1421695969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1421695963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710847986 + 710847987.

It is an arithmetic number, because the mean of its divisors is an integer number (710847987).

Almost surely, 2^1421695973 is an apocalyptic number.

It is an amenable number.

1421695973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421695973 is an equidigital number, since it uses as much as digits as its factorization.

1421695973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 1421695973 is about 37705.3838728636. The cubic root of 1421695973 is about 1124.4381650251.

The spelling of 1421695973 in words is "one billion, four hundred twenty-one million, six hundred ninety-five thousand, nine hundred seventy-three".