1980319877 has 4 divisors (see below), whose sum is σ = 1980798156. Its totient is φ = 1979841600.

The previous prime is 1980319853. The next prime is 1980319933. The reversal of 1980319877 is 7789130891.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1557565156 + 422754721 = 39466^2 + 20561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1980319877 - 2¹² = 1980315781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980319177) 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, 232874 + ... + 241227.

It is an arithmetic number, because the mean of its divisors is an integer number (495199539).

Almost surely, 2^1980319877 is an apocalyptic number.

It is an amenable number.

1980319877 is a deficient number, since it is larger than the sum of its proper divisors (478279).

1980319877 is an equidigital number, since it uses as much as digits as its factorization.

1980319877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478278.

The product of its (nonzero) digits is 762048, while the sum is 53.

The square root of 1980319877 is about 44500.7851279053. The cubic root of 1980319877 is about 1255.7748535285.

The spelling of 1980319877 in words is "one billion, nine hundred eighty million, three hundred nineteen thousand, eight hundred seventy-seven".