395790649 has 2 divisors, whose sum is σ = 395790650. Its totient is φ = 395790648.

The previous prime is 395790623. The next prime is 395790677. The reversal of 395790649 is 946097593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286692624 + 109098025 = 16932^2 + 10445^2 .

It is a cyclic number.

It is not a de Polignac number, because 395790649 - 2⁹ = 395790137 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 395790596 and 395790605.

It is not a weakly prime, because it can be changed into another prime (395790449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197895324 + 197895325.

It is an arithmetic number, because the mean of its divisors is an integer number (197895325).

Almost surely, 2^395790649 is an apocalyptic number.

It is an amenable number.

395790649 is a deficient number, since it is larger than the sum of its proper divisors (1).

395790649 is an equidigital number, since it uses as much as digits as its factorization.

395790649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 52.

The square root of 395790649 is about 19894.4879049449. The cubic root of 395790649 is about 734.2126166249.

The spelling of 395790649 in words is "three hundred ninety-five million, seven hundred ninety thousand, six hundred forty-nine".