161072371 has 2 divisors, whose sum is σ = 161072372. Its totient is φ = 161072370.

The previous prime is 161072369. The next prime is 161072411. The reversal of 161072371 is 173270161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161072371 - 2¹ = 161072369 is a prime.

Together with 161072369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (161072321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80536185 + 80536186.

It is an arithmetic number, because the mean of its divisors is an integer number (80536186).

Almost surely, 2^161072371 is an apocalyptic number.

161072371 is a deficient number, since it is larger than the sum of its proper divisors (1).

161072371 is an equidigital number, since it uses as much as digits as its factorization.

161072371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 161072371 is about 12691.4290369525. The cubic root of 161072371 is about 544.0936831791.

The spelling of 161072371 in words is "one hundred sixty-one million, seventy-two thousand, three hundred seventy-one".