395280497657 has 2 divisors, whose sum is σ = 395280497658. Its totient is φ = 395280497656.

The previous prime is 395280497653. The next prime is 395280497687. The reversal of 395280497657 is 756794082593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241917406201 + 153363091456 = 491851^2 + 391616^2 .

It is an emirp because it is prime and its reverse (756794082593) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 395280497657 - 2² = 395280497653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 395280497593 and 395280497602.

It is not a weakly prime, because it can be changed into another prime (395280497653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197640248828 + 197640248829.

It is an arithmetic number, because the mean of its divisors is an integer number (197640248829).

Almost surely, 2^395280497657 is an apocalyptic number.

It is an amenable number.

395280497657 is a deficient number, since it is larger than the sum of its proper divisors (1).

395280497657 is an equidigital number, since it uses as much as digits as its factorization.

395280497657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114307200, while the sum is 65.

The spelling of 395280497657 in words is "three hundred ninety-five billion, two hundred eighty million, four hundred ninety-seven thousand, six hundred fifty-seven".