1234011391 has 2 divisors, whose sum is σ = 1234011392. Its totient is φ = 1234011390.

The previous prime is 1234011347. The next prime is 1234011413. The reversal of 1234011391 is 1931104321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1234011391 is a prime.

It is a super-2 number, since 2×1234011391² = 3045568226235509762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234014391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617005695 + 617005696.

It is an arithmetic number, because the mean of its divisors is an integer number (617005696).

Almost surely, 2^1234011391 is an apocalyptic number.

1234011391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234011391 is an equidigital number, since it uses as much as digits as its factorization.

1234011391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 1234011391 is about 35128.4982741933. The cubic root of 1234011391 is about 1072.6047672516.

The spelling of 1234011391 in words is "one billion, two hundred thirty-four million, eleven thousand, three hundred ninety-one".