399710501 has 2 divisors, whose sum is σ = 399710502. Its totient is φ = 399710500.

The previous prime is 399710473. The next prime is 399710561. The reversal of 399710501 is 105017993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295874401 + 103836100 = 17201^2 + 10190^2 .

It is a cyclic number.

It is not a de Polignac number, because 399710501 - 2¹⁰ = 399709477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399710561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199855250 + 199855251.

It is an arithmetic number, because the mean of its divisors is an integer number (199855251).

Almost surely, 2^399710501 is an apocalyptic number.

It is an amenable number.

399710501 is a deficient number, since it is larger than the sum of its proper divisors (1).

399710501 is an equidigital number, since it uses as much as digits as its factorization.

399710501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 399710501 is about 19992.7612149998. The cubic root of 399710501 is about 736.6285029220.

The spelling of 399710501 in words is "three hundred ninety-nine million, seven hundred ten thousand, five hundred one".