399560699 has 2 divisors, whose sum is σ = 399560700. Its totient is φ = 399560698.

The previous prime is 399560663. The next prime is 399560717. The reversal of 399560699 is 996065993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399560699 - 2¹⁶ = 399495163 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399560659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199780349 + 199780350.

It is an arithmetic number, because the mean of its divisors is an integer number (199780350).

Almost surely, 2^399560699 is an apocalyptic number.

399560699 is a deficient number, since it is larger than the sum of its proper divisors (1).

399560699 is an equidigital number, since it uses as much as digits as its factorization.

399560699 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3542940, while the sum is 56.

The square root of 399560699 is about 19989.0144579466. The cubic root of 399560699 is about 736.5364678025.

The spelling of 399560699 in words is "three hundred ninety-nine million, five hundred sixty thousand, six hundred ninety-nine".