999993970 has 16 divisors (see below), whose sum is σ = 1858053888. Its totient is φ = 387094320.

The previous prime is 999993947. The next prime is 999993971. The reversal of 999993970 is 79399999.

It is not an unprimeable number, because it can be changed into a prime (999993971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1612584 + ... + 1613203.

It is an arithmetic number, because the mean of its divisors is an integer number (116128368).

Almost surely, 2^999993970 is an apocalyptic number.

999993970 is a deficient number, since it is larger than the sum of its proper divisors (858059918).

999993970 is a wasteful number, since it uses less digits than its factorization.

999993970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225825.

The product of its (nonzero) digits is 11160261, while the sum is 64.

The square root of 999993970 is about 31622.6812588686. The cubic root of 999993970 is about 999.9979899960.

The spelling of 999993970 in words is "nine hundred ninety-nine million, nine hundred ninety-three thousand, nine hundred seventy".