399204520269 has 8 divisors (see below), whose sum is σ = 537247205280. Its totient is φ = 263649091056.

The previous prime is 399204520171. The next prime is 399204520271. The reversal of 399204520269 is 962025402993.

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

It is a de Polignac number, because none of the positive numbers 2^k-399204520269 is a prime.

It is a super-2 number, since 2×399204520269² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399204520469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 621813574 + ... + 621814215.

It is an arithmetic number, because the mean of its divisors is an integer number (67155900660).

Almost surely, 2^399204520269 is an apocalyptic number.

It is an amenable number.

399204520269 is a deficient number, since it is larger than the sum of its proper divisors (138042685011).

399204520269 is a wasteful number, since it uses less digits than its factorization.

399204520269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243627899.

The product of its (nonzero) digits is 2099520, while the sum is 51.

The spelling of 399204520269 in words is "three hundred ninety-nine billion, two hundred four million, five hundred twenty thousand, two hundred sixty-nine".