399716077 has 8 divisors (see below), whose sum is σ = 426839040. Its totient is φ = 373482480.

The previous prime is 399716071. The next prime is 399716101. The reversal of 399716077 is 770617993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399716077 - 2¹⁵ = 399683309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 399716077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399716071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221413 + ... + 223210.

It is an arithmetic number, because the mean of its divisors is an integer number (53354880).

Almost surely, 2^399716077 is an apocalyptic number.

It is an amenable number.

399716077 is a deficient number, since it is larger than the sum of its proper divisors (27122963).

399716077 is a wasteful number, since it uses less digits than its factorization.

399716077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444683.

The product of its (nonzero) digits is 500094, while the sum is 49.

The square root of 399716077 is about 19992.9006649861. The cubic root of 399716077 is about 736.6319282523.

The spelling of 399716077 in words is "three hundred ninety-nine million, seven hundred sixteen thousand, seventy-seven".