940400869 has 2 divisors, whose sum is σ = 940400870. Its totient is φ = 940400868.

The previous prime is 940400833. The next prime is 940400899. The reversal of 940400869 is 968004049.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 769785025 + 170615844 = 27745^2 + 13062^2 .

It is an emirp because it is prime and its reverse (968004049) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 940400869 - 2¹¹ = 940398821 is a prime.

It is a super-2 number, since 2×940400869² = 1768707588831910322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940400809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 470200434 + 470200435.

It is an arithmetic number, because the mean of its divisors is an integer number (470200435).

Almost surely, 2^940400869 is an apocalyptic number.

It is an amenable number.

940400869 is a deficient number, since it is larger than the sum of its proper divisors (1).

940400869 is an equidigital number, since it uses as much as digits as its factorization.

940400869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 940400869 is about 30665.9561892337. The cubic root of 940400869 is about 979.7253391751.

The spelling of 940400869 in words is "nine hundred forty million, four hundred thousand, eight hundred sixty-nine".