1973439953 has 2 divisors, whose sum is σ = 1973439954. Its totient is φ = 1973439952.

The previous prime is 1973439947. The next prime is 1973439967. The reversal of 1973439953 is 3599343791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1428310849 + 545129104 = 37793^2 + 23348^2 .

It is a cyclic number.

It is not a de Polignac number, because 1973439953 - 2²⁴ = 1956662737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1973439895 and 1973439904.

It is not a weakly prime, because it can be changed into another prime (1973439913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986719976 + 986719977.

It is an arithmetic number, because the mean of its divisors is an integer number (986719977).

Almost surely, 2^1973439953 is an apocalyptic number.

It is an amenable number.

1973439953 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973439953 is an equidigital number, since it uses as much as digits as its factorization.

1973439953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2755620, while the sum is 53.

The square root of 1973439953 is about 44423.4167191134. The cubic root of 1973439953 is about 1254.3189170183.

The spelling of 1973439953 in words is "one billion, nine hundred seventy-three million, four hundred thirty-nine thousand, nine hundred fifty-three".