181045979 has 2 divisors, whose sum is σ = 181045980. Its totient is φ = 181045978.

The previous prime is 181045973. The next prime is 181045981. The reversal of 181045979 is 979540181.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181045979 is a prime.

Together with 181045981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (181045973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90522989 + 90522990.

It is an arithmetic number, because the mean of its divisors is an integer number (90522990).

Almost surely, 2^181045979 is an apocalyptic number.

181045979 is a deficient number, since it is larger than the sum of its proper divisors (1).

181045979 is an equidigital number, since it uses as much as digits as its factorization.

181045979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 181045979 is about 13455.3327346447. The cubic root of 181045979 is about 565.7131767297.

The spelling of 181045979 in words is "one hundred eighty-one million, forty-five thousand, nine hundred seventy-nine".