1199513955 has 32 divisors (see below), whose sum is σ = 1955923200. Its totient is φ = 627554432.

The previous prime is 1199513941. The next prime is 1199513957. The reversal of 1199513955 is 5593159911.

It is a Cunningham number, because it is equal to 34634²-1.

It is a cyclic number.

It is not a de Polignac number, because 1199513955 - 2⁵ = 1199513923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1199513957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 518341 + ... + 520649.

It is an arithmetic number, because the mean of its divisors is an integer number (61122600).

Almost surely, 2^1199513955 is an apocalyptic number.

1199513955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1199513955 is a deficient number, since it is larger than the sum of its proper divisors (756409245).

1199513955 is a wasteful number, since it uses less digits than its factorization.

1199513955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963.

The product of its digits is 273375, while the sum is 48.

The square root of 1199513955 is about 34633.9999855633. Note that the first 4 decimals coincide. The cubic root of 1199513955 is about 1062.5150776176.

The spelling of 1199513955 in words is "one billion, one hundred ninety-nine million, five hundred thirteen thousand, nine hundred fifty-five".