620401361 has 2 divisors, whose sum is σ = 620401362. Its totient is φ = 620401360.

The previous prime is 620401303. The next prime is 620401367. The reversal of 620401361 is 163104026.

It is a happy number.

620401361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385729600 + 234671761 = 19640^2 + 15319^2 .

It is a cyclic number.

It is not a de Polignac number, because 620401361 - 2¹⁰ = 620400337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (620401367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310200680 + 310200681.

It is an arithmetic number, because the mean of its divisors is an integer number (310200681).

Almost surely, 2^620401361 is an apocalyptic number.

It is an amenable number.

620401361 is a deficient number, since it is larger than the sum of its proper divisors (1).

620401361 is an equidigital number, since it uses as much as digits as its factorization.

620401361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 620401361 is about 24907.8574148801. The cubic root of 620401361 is about 852.8858593295.

Adding to 620401361 its reverse (163104026), we get a palindrome (783505387).

The spelling of 620401361 in words is "six hundred twenty million, four hundred one thousand, three hundred sixty-one".