161306847 has 12 divisors (see below), whose sum is σ = 250921944. Its totient is φ = 99265680.

The previous prime is 161306779. The next prime is 161306869. The reversal of 161306847 is 748603161.

It is a de Polignac number, because none of the positive numbers 2^k-161306847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161306147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 689229 + ... + 689462.

It is an arithmetic number, because the mean of its divisors is an integer number (20910162).

Almost surely, 2^161306847 is an apocalyptic number.

161306847 is a deficient number, since it is larger than the sum of its proper divisors (89615097).

161306847 is a wasteful number, since it uses less digits than its factorization.

161306847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378710 (or 1378707 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 161306847 is about 12700.6632503976. The cubic root of 161306847 is about 544.3575708844.

The spelling of 161306847 in words is "one hundred sixty-one million, three hundred six thousand, eight hundred forty-seven".