70009999 has 4 divisors (see below), whose sum is σ = 73053936. Its totient is φ = 66966064.

The previous prime is 70009987. The next prime is 70010009. The reversal of 70009999 is 99990007.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 70009999 - 2⁷ = 70009871 is a prime.

It is a Duffinian number.

70009999 is a modest number, since divided by 9999 gives 7000 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70009909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1521934 + ... + 1521979.

It is an arithmetic number, because the mean of its divisors is an integer number (18263484).

Almost surely, 2^70009999 is an apocalyptic number.

70009999 is a deficient number, since it is larger than the sum of its proper divisors (3043937).

70009999 is a wasteful number, since it uses less digits than its factorization.

70009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043936.

The product of its (nonzero) digits is 45927, while the sum is 43.

The square root of 70009999 is about 8367.1977985464. The cubic root of 70009999 is about 412.1481522522.

The spelling of 70009999 in words is "seventy million, nine thousand, nine hundred ninety-nine".