1203665623 has 2 divisors, whose sum is σ = 1203665624. Its totient is φ = 1203665622.

The previous prime is 1203665591. The next prime is 1203665633. The reversal of 1203665623 is 3265663021.

It is a strong prime.

It is an emirp because it is prime and its reverse (3265663021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1203665623 - 2⁵ = 1203665591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1203665633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601832811 + 601832812.

It is an arithmetic number, because the mean of its divisors is an integer number (601832812).

Almost surely, 2^1203665623 is an apocalyptic number.

1203665623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203665623 is an equidigital number, since it uses as much as digits as its factorization.

1203665623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 1203665623 is about 34693.8845187448. The cubic root of 1203665623 is about 1063.7394986543.

The spelling of 1203665623 in words is "one billion, two hundred three million, six hundred sixty-five thousand, six hundred twenty-three".