1997009008 has 10 divisors (see below), whose sum is σ = 3869204984. Its totient is φ = 998504496.

The previous prime is 1997008973. The next prime is 1997009009. The reversal of 1997009008 is 8009007991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997009009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62406516 + ... + 62406547.

Almost surely, 2^1997009008 is an apocalyptic number.

It is an amenable number.

1997009008 is a deficient number, since it is larger than the sum of its proper divisors (1872195976).

1997009008 is a wasteful number, since it uses less digits than its factorization.

1997009008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124813071 (or 124813065 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 1997009008 is about 44687.9067310162. The cubic root of 1997009008 is about 1259.2926675795.

The spelling of 1997009008 in words is "one billion, nine hundred ninety-seven million, nine thousand, eight".