11721467389 has 2 divisors, whose sum is σ = 11721467390. Its totient is φ = 11721467388.

The previous prime is 11721467357. The next prime is 11721467419. The reversal of 11721467389 is 98376412711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7557346489 + 4164120900 = 86933^2 + 64530^2 .

It is an emirp because it is prime and its reverse (98376412711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11721467389 - 2⁵ = 11721467357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11721467089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5860733694 + 5860733695.

It is an arithmetic number, because the mean of its divisors is an integer number (5860733695).

Almost surely, 2^11721467389 is an apocalyptic number.

It is an amenable number.

11721467389 is a deficient number, since it is larger than the sum of its proper divisors (1).

11721467389 is an equidigital number, since it uses as much as digits as its factorization.

11721467389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The spelling of 11721467389 in words is "eleven billion, seven hundred twenty-one million, four hundred sixty-seven thousand, three hundred eighty-nine".