1019530397 has 2 divisors, whose sum is σ = 1019530398. Its totient is φ = 1019530396.

The previous prime is 1019530339. The next prime is 1019530399. The reversal of 1019530397 is 7930359101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821452921 + 198077476 = 28661^2 + 14074^2 .

It is a cyclic number.

It is not a de Polignac number, because 1019530397 - 2¹⁰ = 1019529373 is a prime.

Together with 1019530399, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1019530397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1019530399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509765198 + 509765199.

It is an arithmetic number, because the mean of its divisors is an integer number (509765199).

Almost surely, 2^1019530397 is an apocalyptic number.

It is an amenable number.

1019530397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019530397 is an equidigital number, since it uses as much as digits as its factorization.

1019530397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25515, while the sum is 38.

The square root of 1019530397 is about 31930.0860788066. The cubic root of 1019530397 is about 1006.4682044595.

Adding to 1019530397 its reverse (7930359101), we get a palindrome (8949889498).

The spelling of 1019530397 in words is "one billion, nineteen million, five hundred thirty thousand, three hundred ninety-seven".