123180947 has 6 divisors (see below), whose sum is σ = 124105548. Its totient is φ = 122263184.

The previous prime is 123180943. The next prime is 123180989. The reversal of 123180947 is 749081321.

It is not a de Polignac number, because 123180947 - 2² = 123180943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123180943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15488 + ... + 22050.

It is an arithmetic number, because the mean of its divisors is an integer number (20684258).

Almost surely, 2^123180947 is an apocalyptic number.

123180947 is the 5933-rd centered heptagonal number.

123180947 is a deficient number, since it is larger than the sum of its proper divisors (924601).

123180947 is an frugal number, since it uses more digits than its factorization.

123180947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6837 (or 6700 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 123180947 is about 11098.6912291495. The cubic root of 123180947 is about 497.5627347805.

The spelling of 123180947 in words is "one hundred twenty-three million, one hundred eighty thousand, nine hundred forty-seven".