1216929763 has 16 divisors (see below), whose sum is σ = 1404288000. Its totient is φ = 1032987456.

The previous prime is 1216929761. The next prime is 1216929787. The reversal of 1216929763 is 3679296121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1216929763 - 2¹ = 1216929761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216929761) 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, 477270 + ... + 479812.

It is an arithmetic number, because the mean of its divisors is an integer number (87768000).

Almost surely, 2^1216929763 is an apocalyptic number.

1216929763 is a deficient number, since it is larger than the sum of its proper divisors (187358237).

1216929763 is a wasteful number, since it uses less digits than its factorization.

1216929763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3186.

The product of its digits is 244944, while the sum is 46.

The square root of 1216929763 is about 34884.5203922886. The cubic root of 1216929763 is about 1067.6326275880.

The spelling of 1216929763 in words is "one billion, two hundred sixteen million, nine hundred twenty-nine thousand, seven hundred sixty-three".