390320172061 has 2 divisors, whose sum is σ = 390320172062. Its totient is φ = 390320172060.

The previous prime is 390320172019. The next prime is 390320172071. The reversal of 390320172061 is 160271023093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372107320036 + 18212852025 = 610006^2 + 134955^2 .

It is a cyclic number.

It is not a de Polignac number, because 390320172061 - 2¹¹ = 390320170013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (390320172071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195160086030 + 195160086031.

It is an arithmetic number, because the mean of its divisors is an integer number (195160086031).

Almost surely, 2^390320172061 is an apocalyptic number.

It is an amenable number.

390320172061 is a deficient number, since it is larger than the sum of its proper divisors (1).

390320172061 is an equidigital number, since it uses as much as digits as its factorization.

390320172061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 390320172061 in words is "three hundred ninety billion, three hundred twenty million, one hundred seventy-two thousand, sixty-one".