1199513923 has 2 divisors, whose sum is σ = 1199513924. Its totient is φ = 1199513922.

The previous prime is 1199513911. The next prime is 1199513927. The reversal of 1199513923 is 3293159911.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1199513923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1199513923.

It is not a weakly prime, because it can be changed into another prime (1199513927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599756961 + 599756962.

It is an arithmetic number, because the mean of its divisors is an integer number (599756962).

Almost surely, 2^1199513923 is an apocalyptic number.

1199513923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199513923 is an equidigital number, since it uses as much as digits as its factorization.

1199513923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65610, while the sum is 43.

The square root of 1199513923 is about 34633.9995235895. Note that the first 3 decimals coincide. The cubic root of 1199513923 is about 1062.5150681692.

The spelling of 1199513923 in words is "one billion, one hundred ninety-nine million, five hundred thirteen thousand, nine hundred twenty-three".