1216711974 has 16 divisors (see below), whose sum is σ = 2442212208. Its totient is φ = 404105952.

The previous prime is 1216711967. The next prime is 1216712009. The reversal of 1216711974 is 4791176121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364377 + ... + 367700.

It is an arithmetic number, because the mean of its divisors is an integer number (152638263).

Almost surely, 2^1216711974 is an apocalyptic number.

1216711974 is an abundant number, since it is smaller than the sum of its proper divisors (1225500234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1216711974 is a wasteful number, since it uses less digits than its factorization.

1216711974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732359.

The product of its digits is 21168, while the sum is 39.

The square root of 1216711974 is about 34881.3986818189. The cubic root of 1216711974 is about 1067.5689338231.

The spelling of 1216711974 in words is "one billion, two hundred sixteen million, seven hundred eleven thousand, nine hundred seventy-four".