161447001 has 4 divisors (see below), whose sum is σ = 215262672. Its totient is φ = 107631332.

The previous prime is 161446993. The next prime is 161447017. The reversal of 161447001 is 100744161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161447001 - 2³ = 161446993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161447701) 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 3 ways as a sum of consecutive naturals, for example, 26907831 + ... + 26907836.

It is an arithmetic number, because the mean of its divisors is an integer number (53815668).

Almost surely, 2^161447001 is an apocalyptic number.

It is an amenable number.

161447001 is a deficient number, since it is larger than the sum of its proper divisors (53815671).

161447001 is an equidigital number, since it uses as much as digits as its factorization.

161447001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53815670.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 161447001 is about 12706.1796382705. The cubic root of 161447001 is about 544.5151831344.

The spelling of 161447001 in words is "one hundred sixty-one million, four hundred forty-seven thousand, one".