1121961993 has 8 divisors (see below), whose sum is σ = 1499961408. Its totient is φ = 745968624.

The previous prime is 1121961983. The next prime is 1121962001. The reversal of 1121961993 is 3991691211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1121961993 - 2⁹ = 1121961481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121961923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500205 + ... + 502442.

It is an arithmetic number, because the mean of its divisors is an integer number (187495176).

Almost surely, 2^1121961993 is an apocalyptic number.

It is an amenable number.

1121961993 is a deficient number, since it is larger than the sum of its proper divisors (377999415).

1121961993 is a wasteful number, since it uses less digits than its factorization.

1121961993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003023.

The product of its digits is 26244, while the sum is 42.

The square root of 1121961993 is about 33495.7011122323. The cubic root of 1121961993 is about 1039.1048735864.

The spelling of 1121961993 in words is "one billion, one hundred twenty-one million, nine hundred sixty-one thousand, nine hundred ninety-three".