1961393 has 4 divisors (see below), whose sum is σ = 2241600. Its totient is φ = 1681188.

The previous prime is 1961381. The next prime is 1961411. The reversal of 1961393 is 3931691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3931691 = 47 ⋅83653.

It is a cyclic number.

It is not a de Polignac number, because 1961393 - 2⁶ = 1961329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961363) 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, 140093 + ... + 140106.

It is an arithmetic number, because the mean of its divisors is an integer number (560400).

2^1961393 is an apocalyptic number.

It is an amenable number.

1961393 is a deficient number, since it is larger than the sum of its proper divisors (280207).

1961393 is an equidigital number, since it uses as much as digits as its factorization.

1961393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280206.

The product of its digits is 4374, while the sum is 32.

The square root of 1961393 is about 1400.4974116363. The cubic root of 1961393 is about 125.1761356932.

The spelling of 1961393 in words is "one million, nine hundred sixty-one thousand, three hundred ninety-three".