1970795521 has 2 divisors, whose sum is σ = 1970795522. Its totient is φ = 1970795520.

The previous prime is 1970795483. The next prime is 1970795551. The reversal of 1970795521 is 1255970791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1086625296 + 884170225 = 32964^2 + 29735^2 .

It is an emirp because it is prime and its reverse (1255970791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1970795521 is a prime.

It is a super-2 number, since 2×1970795521² = 7768069971187322882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1970795551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985397760 + 985397761.

It is an arithmetic number, because the mean of its divisors is an integer number (985397761).

Almost surely, 2^1970795521 is an apocalyptic number.

It is an amenable number.

1970795521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1970795521 is an equidigital number, since it uses as much as digits as its factorization.

1970795521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 198450, while the sum is 46.

The square root of 1970795521 is about 44393.6427993919. The cubic root of 1970795521 is about 1253.7583993683.

The spelling of 1970795521 in words is "one billion, nine hundred seventy million, seven hundred ninety-five thousand, five hundred twenty-one".