159670691 has 2 divisors, whose sum is σ = 159670692. Its totient is φ = 159670690.

The previous prime is 159670657. The next prime is 159670729. The reversal of 159670691 is 196076951.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 159670691 - 2¹⁴ = 159654307 is a prime.

It is not a weakly prime, because it can be changed into another prime (159670601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79835345 + 79835346.

It is an arithmetic number, because the mean of its divisors is an integer number (79835346).

Almost surely, 2^159670691 is an apocalyptic number.

159670691 is a deficient number, since it is larger than the sum of its proper divisors (1).

159670691 is an equidigital number, since it uses as much as digits as its factorization.

159670691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 159670691 is about 12636.0868547189. The cubic root of 159670691 is about 542.5108166064.

The spelling of 159670691 in words is "one hundred fifty-nine million, six hundred seventy thousand, six hundred ninety-one".