161473013 has 8 divisors (see below), whose sum is σ = 173992728. Its totient is φ = 148967424.

The previous prime is 161472991. The next prime is 161473019. The reversal of 161473013 is 310374161.

It can be written as a sum of positive squares in 4 ways, for example, as 8282884 + 153190129 = 2878^2 + 12377^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161473013 - 2⁸ = 161472757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161473019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43145 + ... + 46737.

It is an arithmetic number, because the mean of its divisors is an integer number (21749091).

Almost surely, 2^161473013 is an apocalyptic number.

161473013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

161473013 is a deficient number, since it is larger than the sum of its proper divisors (12519715).

161473013 is a wasteful number, since it uses less digits than its factorization.

161473013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7063.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 161473013 is about 12707.2031934647. The cubic root of 161473013 is about 544.5444252763.

The spelling of 161473013 in words is "one hundred sixty-one million, four hundred seventy-three thousand, thirteen".