312161593 has 2 divisors, whose sum is σ = 312161594. Its totient is φ = 312161592.

The previous prime is 312161587. The next prime is 312161611. The reversal of 312161593 is 395161213.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256256064 + 55905529 = 16008^2 + 7477^2 .

It is an emirp because it is prime and its reverse (395161213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312161593 - 2²¹ = 310064441 is a prime.

It is not a weakly prime, because it can be changed into another prime (312161513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156080796 + 156080797.

It is an arithmetic number, because the mean of its divisors is an integer number (156080797).

Almost surely, 2^312161593 is an apocalyptic number.

It is an amenable number.

312161593 is a deficient number, since it is larger than the sum of its proper divisors (1).

312161593 is an equidigital number, since it uses as much as digits as its factorization.

312161593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 312161593 is about 17668.0953416037. The cubic root of 312161593 is about 678.3593615624.

The spelling of 312161593 in words is "three hundred twelve million, one hundred sixty-one thousand, five hundred ninety-three".