123493378 has 4 divisors (see below), whose sum is σ = 185240070. Its totient is φ = 61746688.

The previous prime is 123493361. The next prime is 123493379. The reversal of 123493378 is 873394321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 873394321 = 229 ⋅3813949.

It can be written as a sum of positive squares in only one way, i.e., 109558089 + 13935289 = 10467^2 + 3733^2 .

It is a super-2 number, since 2×123493378² = 30501228819701768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123493378.

It is not an unprimeable number, because it can be changed into a prime (123493379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30873343 + ... + 30873346.

Almost surely, 2^123493378 is an apocalyptic number.

123493378 is a deficient number, since it is larger than the sum of its proper divisors (61746692).

123493378 is an equidigital number, since it uses as much as digits as its factorization.

123493378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61746691.

The product of its digits is 108864, while the sum is 40.

The square root of 123493378 is about 11112.7574435871. The cubic root of 123493378 is about 497.9830453952.

The spelling of 123493378 in words is "one hundred twenty-three million, four hundred ninety-three thousand, three hundred seventy-eight".