182157949 has 4 divisors (see below), whose sum is σ = 184035964. Its totient is φ = 180279936.

The previous prime is 182157917. The next prime is 182157973. The reversal of 182157949 is 949751281.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949751281 = 20509 ⋅46309.

It can be written as a sum of positive squares in 2 ways, for example, as 105472900 + 76685049 = 10270^2 + 8757^2 .

It is a cyclic number.

It is not a de Polignac number, because 182157949 - 2⁵ = 182157917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 182157899 and 182157908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (182157649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 938862 + ... + 939055.

It is an arithmetic number, because the mean of its divisors is an integer number (46008991).

Almost surely, 2^182157949 is an apocalyptic number.

It is an amenable number.

182157949 is a deficient number, since it is larger than the sum of its proper divisors (1878015).

182157949 is an equidigital number, since it uses as much as digits as its factorization.

182157949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878014.

The product of its digits is 181440, while the sum is 46.

The square root of 182157949 is about 13496.5902731023. The cubic root of 182157949 is about 566.8690020626.

The spelling of 182157949 in words is "one hundred eighty-two million, one hundred fifty-seven thousand, nine hundred forty-nine".