940399 has 2 divisors, whose sum is σ = 940400. Its totient is φ = 940398.

The previous prime is 940369. The next prime is 940403. The reversal of 940399 is 993049.

It is a strong prime.

It is an emirp because it is prime and its reverse (993049) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 940399 - 2⁷ = 940271 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (940319) 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, 470199 + 470200.

It is an arithmetic number, because the mean of its divisors is an integer number (470200).

2⁹⁴⁰³⁹⁹ is an apocalyptic number.

940399 is a deficient number, since it is larger than the sum of its proper divisors (1).

940399 is an equidigital number, since it uses as much as digits as its factorization.

940399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 940399 is about 969.7417181910. The cubic root of 940399 is about 97.9724690123.

Subtracting 940399 from its reverse (993049), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 940399 in words is "nine hundred forty thousand, three hundred ninety-nine".