1216679673 has 16 divisors (see below), whose sum is σ = 1771702272. Its totient is φ = 736554000.

The previous prime is 1216679663. The next prime is 1216679689. The reversal of 1216679673 is 3769766121.

It is a happy number.

It is not a de Polignac number, because 1216679673 - 2⁴ = 1216679657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216679603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9828 + ... + 50298.

It is an arithmetic number, because the mean of its divisors is an integer number (110731392).

Almost surely, 2^1216679673 is an apocalyptic number.

It is an amenable number.

1216679673 is a deficient number, since it is larger than the sum of its proper divisors (555022599).

1216679673 is a wasteful number, since it uses less digits than its factorization.

1216679673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41396.

The product of its digits is 571536, while the sum is 48.

The square root of 1216679673 is about 34880.9356669227. The cubic root of 1216679673 is about 1067.5594865449.

The spelling of 1216679673 in words is "one billion, two hundred sixteen million, six hundred seventy-nine thousand, six hundred seventy-three".