1980992471 has 4 divisors (see below), whose sum is σ = 1981173744. Its totient is φ = 1980811200.

The previous prime is 1980992467. The next prime is 1980992483. The reversal of 1980992471 is 1742990891.

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

It is a cyclic number.

It is not a de Polignac number, because 1980992471 - 2² = 1980992467 is a prime.

It is a super-3 number, since 3×1980992471³ (a number of 29 digits) contains 333 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 (1980992401) 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, 73115 + ... + 96476.

It is an arithmetic number, because the mean of its divisors is an integer number (495293436).

Almost surely, 2^1980992471 is an apocalyptic number.

1980992471 is a deficient number, since it is larger than the sum of its proper divisors (181273).

1980992471 is a wasteful number, since it uses less digits than its factorization.

1980992471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181272.

The product of its (nonzero) digits is 326592, while the sum is 50.

The square root of 1980992471 is about 44508.3415889651. The cubic root of 1980992471 is about 1255.9170075036.

The spelling of 1980992471 in words is "one billion, nine hundred eighty million, nine hundred ninety-two thousand, four hundred seventy-one".