399619071 has 6 divisors (see below), whose sum is σ = 577227560. Its totient is φ = 266412708.

The previous prime is 399619069. The next prime is 399619079. The reversal of 399619071 is 170916993.

399619071 is a `hidden beast` number, since 399 + 6 + 190 + 71 = 666.

It is not a de Polignac number, because 399619071 - 2¹ = 399619069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399619079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22201051 + ... + 22201068.

Almost surely, 2^399619071 is an apocalyptic number.

399619071 is a deficient number, since it is larger than the sum of its proper divisors (177608489).

399619071 is a wasteful number, since it uses less digits than its factorization.

399619071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44402125 (or 44402122 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 399619071 is about 19990.4745066244. The cubic root of 399619071 is about 736.5723330360.

The spelling of 399619071 in words is "three hundred ninety-nine million, six hundred nineteen thousand, seventy-one".