399883501 has 2 divisors, whose sum is σ = 399883502. Its totient is φ = 399883500.

The previous prime is 399883453. The next prime is 399883511. The reversal of 399883501 is 105388993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340439401 + 59444100 = 18451^2 + 7710^2 .

It is a cyclic number.

It is not a de Polignac number, because 399883501 - 2¹¹ = 399881453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399883511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199941750 + 199941751.

It is an arithmetic number, because the mean of its divisors is an integer number (199941751).

Almost surely, 2^399883501 is an apocalyptic number.

It is an amenable number.

399883501 is a deficient number, since it is larger than the sum of its proper divisors (1).

399883501 is an equidigital number, since it uses as much as digits as its factorization.

399883501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 399883501 is about 19997.0873129063. The cubic root of 399883501 is about 736.7347617850.

The spelling of 399883501 in words is "three hundred ninety-nine million, eight hundred eighty-three thousand, five hundred one".