1991707022 has 16 divisors (see below), whose sum is σ = 3013353600. Its totient is φ = 987292152.

The previous prime is 1991707007. The next prime is 1991707027. The reversal of 1991707022 is 2207071991.

It is a super-2 number, since 2×1991707022² = 7933793722968216968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1991707027) 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, 103793 + ... + 121475.

It is an arithmetic number, because the mean of its divisors is an integer number (188334600).

Almost surely, 2^1991707022 is an apocalyptic number.

1991707022 is a deficient number, since it is larger than the sum of its proper divisors (1021646578).

1991707022 is a wasteful number, since it uses less digits than its factorization.

1991707022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18167.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 1991707022 is about 44628.5449236248. The cubic root of 1991707022 is about 1258.1772211557.

The spelling of 1991707022 in words is "one billion, nine hundred ninety-one million, seven hundred seven thousand, twenty-two".