181479197 has 2 divisors, whose sum is σ = 181479198. Its totient is φ = 181479196.

The previous prime is 181479149. The next prime is 181479211. The reversal of 181479197 is 791974181.

181479197 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 can be written as a sum of positive squares in only one way, i.e., 114468601 + 67010596 = 10699^2 + 8186^2 .

It is an emirp because it is prime and its reverse (791974181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 181479197 - 2¹⁸ = 181217053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (181479997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90739598 + 90739599.

It is an arithmetic number, because the mean of its divisors is an integer number (90739599).

Almost surely, 2^181479197 is an apocalyptic number.

It is an amenable number.

181479197 is a deficient number, since it is larger than the sum of its proper divisors (1).

181479197 is an equidigital number, since it uses as much as digits as its factorization.

181479197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 47.

The square root of 181479197 is about 13471.4214914388. The cubic root of 181479197 is about 566.1640417774.

The spelling of 181479197 in words is "one hundred eighty-one million, four hundred seventy-nine thousand, one hundred ninety-seven".