1218672623 has 4 divisors (see below), whose sum is σ = 1392768720. Its totient is φ = 1044576528.

The previous prime is 1218672607. The next prime is 1218672667. The reversal of 1218672623 is 3262768121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3262768121 = 11497 ⋅283793.

It is a cyclic number.

It is not a de Polignac number, because 1218672623 - 2⁴ = 1218672607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218672683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87048038 + ... + 87048051.

It is an arithmetic number, because the mean of its divisors is an integer number (348192180).

Almost surely, 2^1218672623 is an apocalyptic number.

1218672623 is a deficient number, since it is larger than the sum of its proper divisors (174096097).

1218672623 is an equidigital number, since it uses as much as digits as its factorization.

1218672623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174096096.

The product of its digits is 48384, while the sum is 38.

The square root of 1218672623 is about 34909.4918754198. The cubic root of 1218672623 is about 1068.1420644411.

The spelling of 1218672623 in words is "one billion, two hundred eighteen million, six hundred seventy-two thousand, six hundred twenty-three".