399025453 has 2 divisors, whose sum is σ = 399025454. Its totient is φ = 399025452.

The previous prime is 399025369. The next prime is 399025463. The reversal of 399025453 is 354520993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393744649 + 5280804 = 19843^2 + 2298^2 .

It is a cyclic number.

It is not a de Polignac number, because 399025453 - 2¹⁷ = 398894381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399025463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199512726 + 199512727.

It is an arithmetic number, because the mean of its divisors is an integer number (199512727).

Almost surely, 2^399025453 is an apocalyptic number.

It is an amenable number.

399025453 is a deficient number, since it is larger than the sum of its proper divisors (1).

399025453 is an equidigital number, since it uses as much as digits as its factorization.

399025453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 399025453 is about 19975.6214671784. The cubic root of 399025453 is about 736.2074361397.

The spelling of 399025453 in words is "three hundred ninety-nine million, twenty-five thousand, four hundred fifty-three".