1023412391 has 2 divisors, whose sum is σ = 1023412392. Its totient is φ = 1023412390.

The previous prime is 1023412367. The next prime is 1023412459. The reversal of 1023412391 is 1932143201.

It is a weak prime.

It is an emirp because it is prime and its reverse (1932143201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023412391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1023412391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023412361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511706195 + 511706196.

It is an arithmetic number, because the mean of its divisors is an integer number (511706196).

Almost surely, 2^1023412391 is an apocalyptic number.

1023412391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023412391 is an equidigital number, since it uses as much as digits as its factorization.

1023412391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1023412391 is about 31990.8172918417. The cubic root of 1023412391 is about 1007.7440059042.

Adding to 1023412391 its reverse (1932143201), we get a palindrome (2955555592).

The spelling of 1023412391 in words is "one billion, twenty-three million, four hundred twelve thousand, three hundred ninety-one".