1920913 has 2 divisors, whose sum is σ = 1920914. Its totient is φ = 1920912.

The previous prime is 1920911. The next prime is 1920917. The reversal of 1920913 is 3190291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1774224 + 146689 = 1332^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920913 - 2¹ = 1920911 is a prime.

Together with 1920911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1920911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960456 + 960457.

It is an arithmetic number, because the mean of its divisors is an integer number (960457).

2^1920913 is an apocalyptic number.

It is an amenable number.

1920913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920913 is an equidigital number, since it uses as much as digits as its factorization.

1920913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1920913 is about 1385.9700573966. The cubic root of 1920913 is about 124.3089978335.

The spelling of 1920913 in words is "one million, nine hundred twenty thousand, nine hundred thirteen".