1023719 has 2 divisors, whose sum is σ = 1023720. Its totient is φ = 1023718.

The previous prime is 1023697. The next prime is 1023721. The reversal of 1023719 is 9173201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1023719 - 2¹⁶ = 958183 is a prime.

It is a super-2 number, since 2×1023719² = 2096001181922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1023721, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1023694 and 1023703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511859 + 511860.

It is an arithmetic number, because the mean of its divisors is an integer number (511860).

2^1023719 is an apocalyptic number.

1023719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023719 is an equidigital number, since it uses as much as digits as its factorization.

1023719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1023719 is about 1011.7899979739. The cubic root of 1023719 is about 100.7844634134.

It can be divided in two parts, 1023 and 719, that multiplied together give a palindrome (735537).

The spelling of 1023719 in words is "one million, twenty-three thousand, seven hundred nineteen".