161132291 has 2 divisors, whose sum is σ = 161132292. Its totient is φ = 161132290.

The previous prime is 161132281. The next prime is 161132297. The reversal of 161132291 is 192231161.

161132291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161132291 - 2¹⁸ = 160870147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161132291.

It is not a weakly prime, because it can be changed into another prime (161132297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80566145 + 80566146.

It is an arithmetic number, because the mean of its divisors is an integer number (80566146).

Almost surely, 2^161132291 is an apocalyptic number.

161132291 is a deficient number, since it is larger than the sum of its proper divisors (1).

161132291 is an equidigital number, since it uses as much as digits as its factorization.

161132291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 161132291 is about 12693.7894657191. The cubic root of 161132291 is about 544.1611436450.

The spelling of 161132291 in words is "one hundred sixty-one million, one hundred thirty-two thousand, two hundred ninety-one".