1913969 has 2 divisors, whose sum is σ = 1913970. Its totient is φ = 1913968.

The previous prime is 1913963. The next prime is 1913983. The reversal of 1913969 is 9693191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 255025 = 1288^2 + 505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1913969 is a prime.

It is a super-2 number, since 2×1913969² = 7326554665922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1913963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956984 + 956985.

It is an arithmetic number, because the mean of its divisors is an integer number (956985).

2^1913969 is an apocalyptic number.

It is an amenable number.

1913969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913969 is an equidigital number, since it uses as much as digits as its factorization.

1913969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 38.

The square root of 1913969 is about 1383.4626847154. The cubic root of 1913969 is about 124.1590268010.

It can be divided in two parts, 1913 and 969, that added together give a palindrome (2882).

The spelling of 1913969 in words is "one million, nine hundred thirteen thousand, nine hundred sixty-nine".