1216339907 has 8 divisors (see below), whose sum is σ = 1246849632. Its totient is φ = 1185870400.

The previous prime is 1216339849. The next prime is 1216339913. The reversal of 1216339907 is 7099336121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216339907 - 2¹⁰ = 1216338883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216339997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56657 + ... + 75117.

It is an arithmetic number, because the mean of its divisors is an integer number (155856204).

Almost surely, 2^1216339907 is an apocalyptic number.

1216339907 is a deficient number, since it is larger than the sum of its proper divisors (30509725).

1216339907 is a wasteful number, since it uses less digits than its factorization.

1216339907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20109.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 1216339907 is about 34876.0649586504. The cubic root of 1216339907 is about 1067.4601028989.

The spelling of 1216339907 in words is "one billion, two hundred sixteen million, three hundred thirty-nine thousand, nine hundred seven".