1994243049 has 24 divisors (see below), whose sum is σ = 2956304832. Its totient is φ = 1294967520.

The previous prime is 1994243023. The next prime is 1994243077. The reversal of 1994243049 is 9403424991.

1994243049 is a `hidden beast` number, since 199 + 424 + 30 + 4 + 9 = 666.

It is not a de Polignac number, because 1994243049 - 2¹⁹ = 1993718761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1994242995 and 1994243013.

It is not an unprimeable number, because it can be changed into a prime (1994243749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38914 + ... + 74180.

It is an arithmetic number, because the mean of its divisors is an integer number (123179368).

Almost surely, 2^1994243049 is an apocalyptic number.

It is an amenable number.

1994243049 is a deficient number, since it is larger than the sum of its proper divisors (962061783).

1994243049 is a wasteful number, since it uses less digits than its factorization.

1994243049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35437 (or 35434 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1994243049 is about 44656.9484962867. The cubic root of 1994243049 is about 1258.7110041641.

The spelling of 1994243049 in words is "one billion, nine hundred ninety-four million, two hundred forty-three thousand, forty-nine".