399074771 has 16 divisors (see below), whose sum is σ = 441322560. Its totient is φ = 359546880.

The previous prime is 399074747. The next prime is 399074777. The reversal of 399074771 is 177470993.

It is a cyclic number.

It is not a de Polignac number, because 399074771 - 2¹⁸ = 398812627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399074777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20051 + ... + 34643.

It is an arithmetic number, because the mean of its divisors is an integer number (27582660).

Almost surely, 2^399074771 is an apocalyptic number.

399074771 is a deficient number, since it is larger than the sum of its proper divisors (42247789).

399074771 is a wasteful number, since it uses less digits than its factorization.

399074771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14686.

The product of its (nonzero) digits is 333396, while the sum is 47.

The square root of 399074771 is about 19976.8558837471. The cubic root of 399074771 is about 736.2377656858.

The spelling of 399074771 in words is "three hundred ninety-nine million, seventy-four thousand, seven hundred seventy-one".