1994869 has 2 divisors, whose sum is σ = 1994870. Its totient is φ = 1994868.

The previous prime is 1994843. The next prime is 1994879. The reversal of 1994869 is 9684991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1129969 + 864900 = 1063^2 + 930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1994869 - 2⁹ = 1994357 is a prime.

It is a super-2 number, since 2×1994869² = 7959004654322, which contains 22 as substring.

1994869 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1994879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 997434 + 997435.

It is an arithmetic number, because the mean of its divisors is an integer number (997435).

2^1994869 is an apocalyptic number.

It is an amenable number.

1994869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994869 is an equidigital number, since it uses as much as digits as its factorization.

1994869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 46.

The square root of 1994869 is about 1412.3983149239. The cubic root of 1994869 is about 125.8842684702.

The spelling of 1994869 in words is "one million, nine hundred ninety-four thousand, eight hundred sixty-nine".