1920013 has 2 divisors, whose sum is σ = 1920014. Its totient is φ = 1920012.

The previous prime is 1920011. The next prime is 1920043. The reversal of 1920013 is 3100291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1432809 + 487204 = 1197^2 + 698^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920013 - 2¹ = 1920011 is a prime.

Together with 1920011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960006 + 960007.

It is an arithmetic number, because the mean of its divisors is an integer number (960007).

2^1920013 is an apocalyptic number.

It is an amenable number.

1920013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920013 is an equidigital number, since it uses as much as digits as its factorization.

1920013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1920013 is about 1385.6453370181. The cubic root of 1920013 is about 124.2895807516.

The spelling of 1920013 in words is "one million, nine hundred twenty thousand, thirteen".