1019999956 has 12 divisors (see below), whose sum is σ = 1785668500. Its totient is φ = 509808960.

The previous prime is 1019999951. The next prime is 1019999957. The reversal of 1019999956 is 6599999101.

It can be written as a sum of positive squares in 2 ways, for example, as 146797456 + 873202500 = 12116^2 + 29550^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1019999956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1019999951) 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 3 ways as a sum of consecutive naturals, for example, 35385 + ... + 57376.

Almost surely, 2^1019999956 is an apocalyptic number.

It is an amenable number.

1019999956 is a deficient number, since it is larger than the sum of its proper divisors (765668544).

1019999956 is a wasteful number, since it uses less digits than its factorization.

1019999956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95514 (or 95512 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 58.

The square root of 1019999956 is about 31937.4381564959. The cubic root of 1019999956 is about 1006.6226950858.

The spelling of 1019999956 in words is "one billion, nineteen million, nine hundred ninety-nine thousand, nine hundred fifty-six".