1913161 has 2 divisors, whose sum is σ = 1913162. Its totient is φ = 1913160.

The previous prime is 1913147. The next prime is 1913201. The reversal of 1913161 is 1613191.

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., 1394761 + 518400 = 1181^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1913161 - 2¹⁹ = 1388873 is a prime.

It is not a weakly prime, because it can be changed into another prime (1913861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956580 + 956581.

It is an arithmetic number, because the mean of its divisors is an integer number (956581).

2^1913161 is an apocalyptic number.

It is an amenable number.

1913161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913161 is an equidigital number, since it uses as much as digits as its factorization.

1913161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 22.

The square root of 1913161 is about 1383.1706330023. The cubic root of 1913161 is about 124.1415527085.

The spelling of 1913161 in words is "one million, nine hundred thirteen thousand, one hundred sixty-one".