399993970069 has 8 divisors (see below), whose sum is σ = 410605919360. Its totient is φ = 389520739296.

The previous prime is 399993970063. The next prime is 399993970087. The reversal of 399993970069 is 960079399993.

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 399993970069 - 2¹⁷ = 399993838997 is a prime.

It is a super-2 number, since 2×399993970069² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 399993969983 and 399993970010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399993970063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34673787 + ... + 34685320.

It is an arithmetic number, because the mean of its divisors is an integer number (51325739920).

Almost surely, 2^399993970069 is an apocalyptic number.

It is an amenable number.

399993970069 is a deficient number, since it is larger than the sum of its proper divisors (10611949291).

399993970069 is an equidigital number, since it uses as much as digits as its factorization.

399993970069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69359259.

The product of its (nonzero) digits is 200884698, while the sum is 73.

The spelling of 399993970069 in words is "three hundred ninety-nine billion, nine hundred ninety-three million, nine hundred seventy thousand, sixty-nine".