1009999971 has 12 divisors (see below), whose sum is σ = 1544706072. Its totient is φ = 633725376.

The previous prime is 1009999957. The next prime is 1009999973. The reversal of 1009999971 is 1799999001.

It is not a de Polignac number, because 1009999971 - 2⁷ = 1009999843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1009999973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3300501 + ... + 3300806.

It is an arithmetic number, because the mean of its divisors is an integer number (128725506).

Almost surely, 2^1009999971 is an apocalyptic number.

1009999971 is a deficient number, since it is larger than the sum of its proper divisors (534706101).

1009999971 is a wasteful number, since it uses less digits than its factorization.

1009999971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6601330 (or 6601327 counting only the distinct ones).

The product of its (nonzero) digits is 413343, while the sum is 54.

The square root of 1009999971 is about 31780.4967078867. The cubic root of 1009999971 is about 1003.3222739393.

The spelling of 1009999971 in words is "one billion, nine million, nine hundred ninety-nine thousand, nine hundred seventy-one".