1243013393 has 2 divisors, whose sum is σ = 1243013394. Its totient is φ = 1243013392.

The previous prime is 1243013381. The next prime is 1243013419. The reversal of 1243013393 is 3933103421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660901264 + 582112129 = 25708^2 + 24127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243013393 - 2⁸ = 1243013137 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243013333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621506696 + 621506697.

It is an arithmetic number, because the mean of its divisors is an integer number (621506697).

Almost surely, 2^1243013393 is an apocalyptic number.

It is an amenable number.

1243013393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243013393 is an equidigital number, since it uses as much as digits as its factorization.

1243013393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 1243013393 is about 35256.3950652928. The cubic root of 1243013393 is about 1075.2066357423.

The spelling of 1243013393 in words is "one billion, two hundred forty-three million, thirteen thousand, three hundred ninety-three".