1240023443 has 2 divisors, whose sum is σ = 1240023444. Its totient is φ = 1240023442.

The previous prime is 1240023409. The next prime is 1240023451. The reversal of 1240023443 is 3443200421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1240023443 is a prime.

It is not a weakly prime, because it can be changed into another prime (1240023493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620011721 + 620011722.

It is an arithmetic number, because the mean of its divisors is an integer number (620011722).

Almost surely, 2^1240023443 is an apocalyptic number.

1240023443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240023443 is an equidigital number, since it uses as much as digits as its factorization.

1240023443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1240023443 is about 35213.9665899768. The cubic root of 1240023443 is about 1074.3438412915.

Adding to 1240023443 its reverse (3443200421), we get a palindrome (4683223864).

The spelling of 1240023443 in words is "one billion, two hundred forty million, twenty-three thousand, four hundred forty-three".