1961893 has 2 divisors, whose sum is σ = 1961894. Its totient is φ = 1961892.

The previous prime is 1961887. The next prime is 1961899. The reversal of 1961893 is 3981691.

It is a balanced prime because it is at equal distance from previous prime (1961887) and next prime (1961899).

It can be written as a sum of positive squares in only one way, i.e., 1292769 + 669124 = 1137^2 + 818^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961893 - 2⁹ = 1961381 is a prime.

1961893 is a lucky number.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980946 + 980947.

It is an arithmetic number, because the mean of its divisors is an integer number (980947).

2^1961893 is an apocalyptic number.

It is an amenable number.

1961893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961893 is an equidigital number, since it uses as much as digits as its factorization.

1961893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 37.

The square root of 1961893 is about 1400.6759082671. The cubic root of 1961893 is about 125.1867714591.

The spelling of 1961893 in words is "one million, nine hundred sixty-one thousand, eight hundred ninety-three".