1980523 has 2 divisors, whose sum is σ = 1980524. Its totient is φ = 1980522.

The previous prime is 1980521. The next prime is 1980529. The reversal of 1980523 is 3250891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1980523 - 2¹ = 1980521 is a prime.

Together with 1980521, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1980491 and 1980500.

It is not a weakly prime, because it can be changed into another prime (1980521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990261 + 990262.

It is an arithmetic number, because the mean of its divisors is an integer number (990262).

2^1980523 is an apocalyptic number.

1980523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1980523 is an equidigital number, since it uses as much as digits as its factorization.

1980523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1980523 is about 1407.3105556344. The cubic root of 1980523 is about 125.5817787339.

The spelling of 1980523 in words is "one million, nine hundred eighty thousand, five hundred twenty-three".