1999924497 has 24 divisors (see below), whose sum is σ = 3029742144. Its totient is φ = 1268814624.

The previous prime is 1999924463. The next prime is 1999924513. The reversal of 1999924497 is 7944299991.

1999924497 is a `hidden beast` number, since 19 + 99 + 92 + 449 + 7 = 666.

It is not a de Polignac number, because 1999924497 - 2¹⁶ = 1999858961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1999924447) 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, 16258 + ... + 65300.

It is an arithmetic number, because the mean of its divisors is an integer number (126239256).

Almost surely, 2^1999924497 is an apocalyptic number.

It is an amenable number.

1999924497 is a deficient number, since it is larger than the sum of its proper divisors (1029817647).

1999924497 is a wasteful number, since it uses less digits than its factorization.

1999924497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49269 (or 49266 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 1999924497 is about 44720.5153928261. The cubic root of 1999924497 is about 1259.9051950589.

The spelling of 1999924497 in words is "one billion, nine hundred ninety-nine million, nine hundred twenty-four thousand, four hundred ninety-seven".