161547147 has 12 divisors (see below), whose sum is σ = 243491664. Its totient is φ = 103015440.

The previous prime is 161547137. The next prime is 161547149. The reversal of 161547147 is 741745161.

It is not a de Polignac number, because 161547147 - 2⁶ = 161547083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161547149) 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 in 11 ways as a sum of consecutive naturals, for example, 390004 + ... + 390417.

It is an arithmetic number, because the mean of its divisors is an integer number (20290972).

Almost surely, 2^161547147 is an apocalyptic number.

161547147 is a deficient number, since it is larger than the sum of its proper divisors (81944517).

161547147 is a wasteful number, since it uses less digits than its factorization.

161547147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780450 (or 780447 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 161547147 is about 12710.1198656818. The cubic root of 161547147 is about 544.6277479303.

The spelling of 161547147 in words is "one hundred sixty-one million, five hundred forty-seven thousand, one hundred forty-seven".