181081007 has 2 divisors, whose sum is σ = 181081008. Its totient is φ = 181081006.

The previous prime is 181080961. The next prime is 181081009. The reversal of 181081007 is 700180181.

It is a strong prime.

It is an emirp because it is prime and its reverse (700180181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181081007 - 2⁶ = 181080943 is a prime.

It is a super-2 number, since 2×181081007² = 65580662192268098, which contains 22 as substring.

Together with 181081009, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181081009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90540503 + 90540504.

It is an arithmetic number, because the mean of its divisors is an integer number (90540504).

Almost surely, 2^181081007 is an apocalyptic number.

181081007 is a deficient number, since it is larger than the sum of its proper divisors (1).

181081007 is an equidigital number, since it uses as much as digits as its factorization.

181081007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 26.

The square root of 181081007 is about 13456.6343117438. The cubic root of 181081007 is about 565.7496582972.

The spelling of 181081007 in words is "one hundred eighty-one million, eighty-one thousand, seven".