1600320691 has 2 divisors, whose sum is σ = 1600320692. Its totient is φ = 1600320690.

The previous prime is 1600320679. The next prime is 1600320713. The reversal of 1600320691 is 1960230061.

It is a weak prime.

It is an emirp because it is prime and its reverse (1960230061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1600320691 - 2¹⁹ = 1599796403 is a prime.

It is a super-2 number, since 2×1600320691² = 5122052628085434962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1600320641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800160345 + 800160346.

It is an arithmetic number, because the mean of its divisors is an integer number (800160346).

Almost surely, 2^1600320691 is an apocalyptic number.

1600320691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600320691 is an equidigital number, since it uses as much as digits as its factorization.

1600320691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 1600320691 is about 40004.0084366554. The cubic root of 1600320691 is about 1169.6852322460.

The spelling of 1600320691 in words is "one billion, six hundred million, three hundred twenty thousand, six hundred ninety-one".