1209786923 has 2 divisors, whose sum is σ = 1209786924. Its totient is φ = 1209786922.

The previous prime is 1209786901. The next prime is 1209786971. The reversal of 1209786923 is 3296879021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1209786923 - 2¹⁴ = 1209770539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209726923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604893461 + 604893462.

It is an arithmetic number, because the mean of its divisors is an integer number (604893462).

Almost surely, 2^1209786923 is an apocalyptic number.

1209786923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209786923 is an equidigital number, since it uses as much as digits as its factorization.

1209786923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 1209786923 is about 34781.9913604727. The cubic root of 1209786923 is about 1065.5396834176.

The spelling of 1209786923 in words is "one billion, two hundred nine million, seven hundred eighty-six thousand, nine hundred twenty-three".