161832047 has 4 divisors (see below), whose sum is σ = 174280680. Its totient is φ = 149383416.

The previous prime is 161832037. The next prime is 161832109. The reversal of 161832047 is 740238161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740238161 = 13 ⋅56941397.

It is not a de Polignac number, because 161832047 - 2⁴ = 161832031 is a prime.

It is a super-2 number, since 2×161832047² = 52379222872420418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161832007) 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, 6224297 + ... + 6224322.

It is an arithmetic number, because the mean of its divisors is an integer number (43570170).

Almost surely, 2^161832047 is an apocalyptic number.

161832047 is a deficient number, since it is larger than the sum of its proper divisors (12448633).

161832047 is a wasteful number, since it uses less digits than its factorization.

161832047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12448632.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 161832047 is about 12721.3225334475. The cubic root of 161832047 is about 544.9477232914.

The spelling of 161832047 in words is "one hundred sixty-one million, eight hundred thirty-two thousand, forty-seven".