1799969 has 2 divisors, whose sum is σ = 1799970. Its totient is φ = 1799968.

The previous prime is 1799951. The next prime is 1799983. The reversal of 1799969 is 9699971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1183744 + 616225 = 1088^2 + 785^2 .

It is a cyclic number.

It is not a de Polignac number, because 1799969 - 2⁸ = 1799713 is a prime.

It is a super-2 number, since 2×1799969² = 6479776801922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1799929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899984 + 899985.

It is an arithmetic number, because the mean of its divisors is an integer number (899985).

2^1799969 is an apocalyptic number.

It is an amenable number.

1799969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1799969 is an equidigital number, since it uses as much as digits as its factorization.

1799969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 275562, while the sum is 50.

The square root of 1799969 is about 1341.6292334322. The cubic root of 1799969 is about 121.6433415806.

The spelling of 1799969 in words is "one million, seven hundred ninety-nine thousand, nine hundred sixty-nine".