1219985623 has 2 divisors, whose sum is σ = 1219985624. Its totient is φ = 1219985622.

The previous prime is 1219985593. The next prime is 1219985633. The reversal of 1219985623 is 3265899121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1219985623 - 2¹⁷ = 1219854551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1219985633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609992811 + 609992812.

It is an arithmetic number, because the mean of its divisors is an integer number (609992812).

Almost surely, 2^1219985623 is an apocalyptic number.

1219985623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219985623 is an equidigital number, since it uses as much as digits as its factorization.

1219985623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 1219985623 is about 34928.2925863833. The cubic root of 1219985623 is about 1068.5255327958.

The spelling of 1219985623 in words is "one billion, two hundred nineteen million, nine hundred eighty-five thousand, six hundred twenty-three".