1229664430391 has 2 divisors, whose sum is σ = 1229664430392. Its totient is φ = 1229664430390.

The previous prime is 1229664430369. The next prime is 1229664430459. The reversal of 1229664430391 is 1930344669221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1930344669221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1229664430391 - 2¹⁴ = 1229664414007 is a prime.

It is a super-2 number, since 2×1229664430391² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1229664430301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614832215195 + 614832215196.

It is an arithmetic number, because the mean of its divisors is an integer number (614832215196).

Almost surely, 2^{1229664430391} is an apocalyptic number.

1229664430391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229664430391 is an equidigital number, since it uses as much as digits as its factorization.

1229664430391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 1229664430391 in words is "one trillion, two hundred twenty-nine billion, six hundred sixty-four million, four hundred thirty thousand, three hundred ninety-one".