1199553913 has 2 divisors, whose sum is σ = 1199553914. Its totient is φ = 1199553912.

The previous prime is 1199553911. The next prime is 1199553919. The reversal of 1199553913 is 3193559911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 946362169 + 253191744 = 30763^2 + 15912^2 .

It is a cyclic number.

It is not a de Polignac number, because 1199553913 - 2¹ = 1199553911 is a prime.

It is a super-2 number, since 2×1199553913² = 2877859180387223138, which contains 22 as substring.

Together with 1199553911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1199553911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599776956 + 599776957.

It is an arithmetic number, because the mean of its divisors is an integer number (599776957).

Almost surely, 2^1199553913 is an apocalyptic number.

It is an amenable number.

1199553913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199553913 is an equidigital number, since it uses as much as digits as its factorization.

1199553913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164025, while the sum is 46.

The square root of 1199553913 is about 34634.5768416477. The cubic root of 1199553913 is about 1062.5268755924.

The spelling of 1199553913 in words is "one billion, one hundred ninety-nine million, five hundred fifty-three thousand, nine hundred thirteen".