1231798616 has 8 divisors (see below), whose sum is σ = 2309622420. Its totient is φ = 615899304.

The previous prime is 1231798583. The next prime is 1231798619. The reversal of 1231798616 is 6168971321.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231798619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76987406 + ... + 76987421.

Almost surely, 2^1231798616 is an apocalyptic number.

It is an amenable number.

1231798616 is a deficient number, since it is larger than the sum of its proper divisors (1077823804).

1231798616 is a wasteful number, since it uses less digits than its factorization.

1231798616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153974833 (or 153974829 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 1231798616 is about 35096.9887027363. The cubic root of 1231798616 is about 1071.9632677508.

The spelling of 1231798616 in words is "one billion, two hundred thirty-one million, seven hundred ninety-eight thousand, six hundred sixteen".