2117487772 has 12 divisors (see below), whose sum is σ = 3706795120. Its totient is φ = 1058403456.

The previous prime is 2117487769. The next prime is 2117487791. The reversal of 2117487772 is 2777847112.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 70848 + ... + 96199.

Almost surely, 2^2117487772 is an apocalyptic number.

It is an amenable number.

2117487772 is a deficient number, since it is larger than the sum of its proper divisors (1589307348).

2117487772 is a wasteful number, since it uses less digits than its factorization.

2117487772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170220 (or 170218 counting only the distinct ones).

The product of its digits is 307328, while the sum is 46.

The square root of 2117487772 is about 46016.1685932238. The cubic root of 2117487772 is about 1284.1240219809.

The spelling of 2117487772 in words is "two billion, one hundred seventeen million, four hundred eighty-seven thousand, seven hundred seventy-two".