397045777 has 2 divisors, whose sum is σ = 397045778. Its totient is φ = 397045776.

The previous prime is 397045741. The next prime is 397045787. The reversal of 397045777 is 777540793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203946961 + 193098816 = 14281^2 + 13896^2 .

It is a cyclic number.

It is not a de Polignac number, because 397045777 - 2¹¹ = 397043729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397045777.

It is not a weakly prime, because it can be changed into another prime (397045787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198522888 + 198522889.

It is an arithmetic number, because the mean of its divisors is an integer number (198522889).

Almost surely, 2^397045777 is an apocalyptic number.

It is an amenable number.

397045777 is a deficient number, since it is larger than the sum of its proper divisors (1).

397045777 is an equidigital number, since it uses as much as digits as its factorization.

397045777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296540, while the sum is 49.

The square root of 397045777 is about 19926.0075529445. The cubic root of 397045777 is about 734.9879073087.

The spelling of 397045777 in words is "three hundred ninety-seven million, forty-five thousand, seven hundred seventy-seven".