1199121983 has 4 divisors (see below), whose sum is σ = 1210764048. Its totient is φ = 1187479920.

The previous prime is 1199121967. The next prime is 1199121991. The reversal of 1199121983 is 3891219911.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1199121983 - 2⁴ = 1199121967 is a prime.

It is a super-2 number, since 2×1199121983² = 2875787060227704578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199121953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5820878 + ... + 5821083.

It is an arithmetic number, because the mean of its divisors is an integer number (302691012).

Almost surely, 2^1199121983 is an apocalyptic number.

1199121983 is a deficient number, since it is larger than the sum of its proper divisors (11642065).

1199121983 is a wasteful number, since it uses less digits than its factorization.

1199121983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11642064.

The product of its digits is 34992, while the sum is 44.

The square root of 1199121983 is about 34628.3407485834. The cubic root of 1199121983 is about 1062.3993303098.

The spelling of 1199121983 in words is "one billion, one hundred ninety-nine million, one hundred twenty-one thousand, nine hundred eighty-three".