161375047 has 4 divisors (see below), whose sum is σ = 161407816. Its totient is φ = 161342280.

The previous prime is 161375029. The next prime is 161375051. The reversal of 161375047 is 740573161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740573161 = 1021 ⋅725341.

It is a cyclic number.

It is not a de Polignac number, because 161375047 - 2²³ = 152986439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161375447) 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, 7329 + ... + 19402.

It is an arithmetic number, because the mean of its divisors is an integer number (40351954).

Almost surely, 2^161375047 is an apocalyptic number.

161375047 is a deficient number, since it is larger than the sum of its proper divisors (32769).

161375047 is an equidigital number, since it uses as much as digits as its factorization.

161375047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32768.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 161375047 is about 12703.3478658187. The cubic root of 161375047 is about 544.4342776003.

The spelling of 161375047 in words is "one hundred sixty-one million, three hundred seventy-five thousand, forty-seven".