1019913161 has 2 divisors, whose sum is σ = 1019913162. Its totient is φ = 1019913160.

The previous prime is 1019913137. The next prime is 1019913163. The reversal of 1019913161 is 1613199101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802645561 + 217267600 = 28331^2 + 14740^2 .

It is a cyclic number.

It is not a de Polignac number, because 1019913161 - 2¹⁰ = 1019912137 is a prime.

Together with 1019913163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1019913163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509956580 + 509956581.

It is an arithmetic number, because the mean of its divisors is an integer number (509956581).

Almost surely, 2^1019913161 is an apocalyptic number.

It is an amenable number.

1019913161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019913161 is an equidigital number, since it uses as much as digits as its factorization.

1019913161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 1019913161 is about 31936.0792991250. The cubic root of 1019913161 is about 1006.5941420469.

The spelling of 1019913161 in words is "one billion, nineteen million, nine hundred thirteen thousand, one hundred sixty-one".