1212653623 has 2 divisors, whose sum is σ = 1212653624. Its totient is φ = 1212653622.

The previous prime is 1212653573. The next prime is 1212653657. The reversal of 1212653623 is 3263562121.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3263562121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212653623 - 2⁹ = 1212653111 is a prime.

It is a super-2 number, since 2×1212653623² = 2941057618750052258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212653693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606326811 + 606326812.

It is an arithmetic number, because the mean of its divisors is an integer number (606326812).

Almost surely, 2^1212653623 is an apocalyptic number.

1212653623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212653623 is an equidigital number, since it uses as much as digits as its factorization.

1212653623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 1212653623 is about 34823.1765208173. The cubic root of 1212653623 is about 1066.3806505388.

The spelling of 1212653623 in words is "one billion, two hundred twelve million, six hundred fifty-three thousand, six hundred twenty-three".