399754373 has 2 divisors, whose sum is σ = 399754374. Its totient is φ = 399754372.

The previous prime is 399754321. The next prime is 399754379. The reversal of 399754373 is 373457993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285542404 + 114211969 = 16898^2 + 10687^2 .

It is an emirp because it is prime and its reverse (373457993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399754373 - 2⁶ = 399754309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399754379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199877186 + 199877187.

It is an arithmetic number, because the mean of its divisors is an integer number (199877187).

Almost surely, 2^399754373 is an apocalyptic number.

It is an amenable number.

399754373 is a deficient number, since it is larger than the sum of its proper divisors (1).

399754373 is an equidigital number, since it uses as much as digits as its factorization.

399754373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2143260, while the sum is 50.

The square root of 399754373 is about 19993.8583820132. The cubic root of 399754373 is about 736.6554525796.

The spelling of 399754373 in words is "three hundred ninety-nine million, seven hundred fifty-four thousand, three hundred seventy-three".