1940423 has 2 divisors, whose sum is σ = 1940424. Its totient is φ = 1940422.

The previous prime is 1940401. The next prime is 1940437. The reversal of 1940423 is 3240491.

It is a strong prime.

It is an emirp because it is prime and its reverse (3240491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1940423 - 2¹² = 1936327 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1940443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970211 + 970212.

It is an arithmetic number, because the mean of its divisors is an integer number (970212).

2^1940423 is an apocalyptic number.

1940423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1940423 is an equidigital number, since it uses as much as digits as its factorization.

1940423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1940423 is about 1392.9906675926. The cubic root of 1940423 is about 124.7284344444.

The spelling of 1940423 in words is "one million, nine hundred forty thousand, four hundred twenty-three".