161151943 has 2 divisors, whose sum is σ = 161151944. Its totient is φ = 161151942.

The previous prime is 161151941. The next prime is 161151967. The reversal of 161151943 is 349151161.

It is a weak prime.

It is an emirp because it is prime and its reverse (349151161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161151943 - 2¹ = 161151941 is a prime.

Together with 161151941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161151941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80575971 + 80575972.

It is an arithmetic number, because the mean of its divisors is an integer number (80575972).

Almost surely, 2^161151943 is an apocalyptic number.

161151943 is a deficient number, since it is larger than the sum of its proper divisors (1).

161151943 is an equidigital number, since it uses as much as digits as its factorization.

161151943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 161151943 is about 12694.5635214449. The cubic root of 161151943 is about 544.1832650543.

The spelling of 161151943 in words is "one hundred sixty-one million, one hundred fifty-one thousand, nine hundred forty-three".