999770013 has 32 divisors (see below), whose sum is σ = 1631836800. Its totient is φ = 599904000.

The previous prime is 999770011. The next prime is 999770021. The reversal of 999770013 is 310077999.

It is not a de Polignac number, because 999770013 - 2¹ = 999770011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999770011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13333 + ... + 46661.

It is an arithmetic number, because the mean of its divisors is an integer number (50994900).

Almost surely, 2^999770013 is an apocalyptic number.

999770013 is the 19998-th heptagonal number.

It is an amenable number.

999770013 is a deficient number, since it is larger than the sum of its proper divisors (632066787).

999770013 is a wasteful number, since it uses less digits than its factorization.

999770013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33450 (or 33444 counting only the distinct ones).

The product of its (nonzero) digits is 107163, while the sum is 45.

The square root of 999770013 is about 31619.1399788166. The cubic root of 999770013 is about 999.9233317888.

The spelling of 999770013 in words is "nine hundred ninety-nine million, seven hundred seventy thousand, thirteen".