389956303081 has 4 divisors (see below), whose sum is σ = 393976471252. Its totient is φ = 385936134912.

The previous prime is 389956303057. The next prime is 389956303151. The reversal of 389956303081 is 180303659983.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219436033600 + 170520269481 = 468440^2 + 412941^2 .

It is a cyclic number.

It is not a de Polignac number, because 389956303081 - 2⁵ = 389956303049 is a prime.

It is a super-2 number, since 2×389956303081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389956003081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2010083940 + ... + 2010084133.

It is an arithmetic number, because the mean of its divisors is an integer number (98494117813).

Almost surely, 2^389956303081 is an apocalyptic number.

It is an amenable number.

389956303081 is a deficient number, since it is larger than the sum of its proper divisors (4020168171).

389956303081 is an equidigital number, since it uses as much as digits as its factorization.

389956303081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4020168170.

The product of its (nonzero) digits is 4199040, while the sum is 55.

The spelling of 389956303081 in words is "three hundred eighty-nine billion, nine hundred fifty-six million, three hundred three thousand, eighty-one".