123188961 has 8 divisors (see below), whose sum is σ = 187716544. Its totient is φ = 70393680.

The previous prime is 123188959. The next prime is 123188963. The reversal of 123188961 is 169881321.

It is an interprime number because it is at equal distance from previous prime (123188959) and next prime (123188963).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123188961 - 2¹ = 123188959 is a prime.

It is a super-2 number, since 2×123188961² = 30351040224519042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123188963) 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 7 ways as a sum of consecutive naturals, for example, 2933050 + ... + 2933091.

It is an arithmetic number, because the mean of its divisors is an integer number (23464568).

Almost surely, 2^123188961 is an apocalyptic number.

It is an amenable number.

123188961 is a deficient number, since it is larger than the sum of its proper divisors (64527583).

123188961 is an equidigital number, since it uses as much as digits as its factorization.

123188961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866151.

The product of its digits is 20736, while the sum is 39.

The square root of 123188961 is about 11099.0522568371. The cubic root of 123188961 is about 497.5735248185.

The spelling of 123188961 in words is "one hundred twenty-three million, one hundred eighty-eight thousand, nine hundred sixty-one".