1969371973 has 2 divisors, whose sum is σ = 1969371974. Its totient is φ = 1969371972.

The previous prime is 1969371947. The next prime is 1969372001. The reversal of 1969371973 is 3791739691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1965769569 + 3602404 = 44337^2 + 1898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1969371973 - 2¹⁷ = 1969240901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1969371913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984685986 + 984685987.

It is an arithmetic number, because the mean of its divisors is an integer number (984685987).

Almost surely, 2^1969371973 is an apocalyptic number.

It is an amenable number.

1969371973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969371973 is an equidigital number, since it uses as much as digits as its factorization.

1969371973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1928934, while the sum is 55.

The square root of 1969371973 is about 44377.6066614683. The cubic root of 1969371973 is about 1253.4564544354.

The spelling of 1969371973 in words is "one billion, nine hundred sixty-nine million, three hundred seventy-one thousand, nine hundred seventy-three".