160731649 has 4 divisors (see below), whose sum is σ = 173095636. Its totient is φ = 148367664.

The previous prime is 160731647. The next prime is 160731653. The reversal of 160731649 is 946137061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59367025 + 101364624 = 7705^2 + 10068^2 .

It is a cyclic number.

It is not a de Polignac number, because 160731649 - 2¹ = 160731647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160731647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6181974 + ... + 6181999.

It is an arithmetic number, because the mean of its divisors is an integer number (43273909).

Almost surely, 2^160731649 is an apocalyptic number.

It is an amenable number.

160731649 is a deficient number, since it is larger than the sum of its proper divisors (12363987).

160731649 is a wasteful number, since it uses less digits than its factorization.

160731649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12363986.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 160731649 is about 12677.9986196560. The cubic root of 160731649 is about 543.7097655701.

The spelling of 160731649 in words is "one hundred sixty million, seven hundred thirty-one thousand, six hundred forty-nine".