1980788471 has 4 divisors (see below), whose sum is σ = 1981237944. Its totient is φ = 1980339000.

The previous prime is 1980788461. The next prime is 1980788519. The reversal of 1980788471 is 1748870891.

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 1980788471 - 2²² = 1976594167 is a prime.

It is a super-3 number, since 3×1980788471³ (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 (1980788461) 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, 218060 + ... + 226961.

It is an arithmetic number, because the mean of its divisors is an integer number (495309486).

Almost surely, 2^1980788471 is an apocalyptic number.

1980788471 is a deficient number, since it is larger than the sum of its proper divisors (449473).

1980788471 is an equidigital number, since it uses as much as digits as its factorization.

1980788471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449472.

The product of its (nonzero) digits is 903168, while the sum is 53.

The square root of 1980788471 is about 44506.0498247148. The cubic root of 1980788471 is about 1255.8738951296.

The spelling of 1980788471 in words is "one billion, nine hundred eighty million, seven hundred eighty-eight thousand, four hundred seventy-one".