1139423 has 2 divisors, whose sum is σ = 1139424. Its totient is φ = 1139422.

The previous prime is 1139407. The next prime is 1139461. The reversal of 1139423 is 3249311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1139423 - 2⁴ = 1139407 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 (1139473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569711 + 569712.

It is an arithmetic number, because the mean of its divisors is an integer number (569712).

2^1139423 is an apocalyptic number.

1139423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1139423 is an equidigital number, since it uses as much as digits as its factorization.

1139423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 1139423 is about 1067.4375859974. The cubic root of 1139423 is about 104.4467651598.

The spelling of 1139423 in words is "one million, one hundred thirty-nine thousand, four hundred twenty-three".