1006787791 has 4 divisors (see below), whose sum is σ = 1007207784. Its totient is φ = 1006367800.

The previous prime is 1006787779. The next prime is 1006787833. The reversal of 1006787791 is 1977876001.

1006787791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006787791 is a prime.

It is a super-2 number, since 2×1006787791² = 2027243312213319362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1006787731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206380 + ... + 211201.

It is an arithmetic number, because the mean of its divisors is an integer number (251801946).

Almost surely, 2^1006787791 is an apocalyptic number.

1006787791 is a deficient number, since it is larger than the sum of its proper divisors (419993).

1006787791 is an equidigital number, since it uses as much as digits as its factorization.

1006787791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419992.

The product of its (nonzero) digits is 148176, while the sum is 46.

The square root of 1006787791 is about 31729.9194924916. The cubic root of 1006787791 is about 1002.2574968729.

The spelling of 1006787791 in words is "one billion, six million, seven hundred eighty-seven thousand, seven hundred ninety-one".