320003401261 has 2 divisors, whose sum is σ = 320003401262. Its totient is φ = 320003401260.

The previous prime is 320003401259. The next prime is 320003401271. The reversal of 320003401261 is 162104300023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 319501910025 + 501491236 = 565245^2 + 22394^2 .

It is an emirp because it is prime and its reverse (162104300023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320003401261 - 2¹ = 320003401259 is a prime.

Together with 320003401259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320003401271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160001700630 + 160001700631.

It is an arithmetic number, because the mean of its divisors is an integer number (160001700631).

Almost surely, 2^320003401261 is an apocalyptic number.

It is an amenable number.

320003401261 is a deficient number, since it is larger than the sum of its proper divisors (1).

320003401261 is an equidigital number, since it uses as much as digits as its factorization.

320003401261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 320003401261 its reverse (162104300023), we get a palindrome (482107701284).

The spelling of 320003401261 in words is "three hundred twenty billion, three million, four hundred one thousand, two hundred sixty-one".