181371049 has 4 divisors (see below), whose sum is σ = 187221760. Its totient is φ = 175520340.

The previous prime is 181371023. The next prime is 181371061. The reversal of 181371049 is 940173181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181371049 is a prime.

It is a super-4 number, since 4×181371049⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181371349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2925309 + ... + 2925370.

It is an arithmetic number, because the mean of its divisors is an integer number (46805440).

Almost surely, 2^181371049 is an apocalyptic number.

It is an amenable number.

181371049 is a deficient number, since it is larger than the sum of its proper divisors (5850711).

181371049 is an equidigital number, since it uses as much as digits as its factorization.

181371049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5850710.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 181371049 is about 13467.4069144732. The cubic root of 181371049 is about 566.0515556512.

The spelling of 181371049 in words is "one hundred eighty-one million, three hundred seventy-one thousand, forty-nine".