1605295897 has 2 divisors, whose sum is σ = 1605295898. Its totient is φ = 1605295896.

The previous prime is 1605295843. The next prime is 1605295903. The reversal of 1605295897 is 7985925061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338169561 + 267126336 = 36581^2 + 16344^2 .

It is a cyclic number.

It is not a de Polignac number, because 1605295897 - 2¹¹ = 1605293849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1605295297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 802647948 + 802647949.

It is an arithmetic number, because the mean of its divisors is an integer number (802647949).

Almost surely, 2^1605295897 is an apocalyptic number.

It is an amenable number.

1605295897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1605295897 is an equidigital number, since it uses as much as digits as its factorization.

1605295897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 52.

The square root of 1605295897 is about 40066.1440246001. The cubic root of 1605295897 is about 1170.8961155355.

The spelling of 1605295897 in words is "one billion, six hundred five million, two hundred ninety-five thousand, eight hundred ninety-seven".