1980452317 has 2 divisors, whose sum is σ = 1980452318. Its totient is φ = 1980452316.

The previous prime is 1980452303. The next prime is 1980452347. The reversal of 1980452317 is 7132540891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1544018436 + 436433881 = 39294^2 + 20891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980452317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1980452317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1980452347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990226158 + 990226159.

It is an arithmetic number, because the mean of its divisors is an integer number (990226159).

Almost surely, 2^1980452317 is an apocalyptic number.

It is an amenable number.

1980452317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980452317 is an equidigital number, since it uses as much as digits as its factorization.

1980452317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1980452317 is about 44502.2731666597. The cubic root of 1980452317 is about 1255.8028475101.

The spelling of 1980452317 in words is "one billion, nine hundred eighty million, four hundred fifty-two thousand, three hundred seventeen".