123229978 has 8 divisors (see below), whose sum is σ = 185436468. Its totient is φ = 61417824.

The previous prime is 123229973. The next prime is 123229979. The reversal of 123229978 is 879922321.

It can be written as a sum of positive squares in 2 ways, for example, as 114211969 + 9018009 = 10687^2 + 3003^2 .

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

It is not an unprimeable number, because it can be changed into a prime (123229973) 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, 97801 + ... + 99052.

Almost surely, 2^123229978 is an apocalyptic number.

123229978 is a deficient number, since it is larger than the sum of its proper divisors (62206490).

123229978 is a wasteful number, since it uses less digits than its factorization.

123229978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197168.

The product of its digits is 108864, while the sum is 43.

The square root of 123229978 is about 11100.8998734337. The cubic root of 123229978 is about 497.6287427222.

The spelling of 123229978 in words is "one hundred twenty-three million, two hundred twenty-nine thousand, nine hundred seventy-eight".