1011234391 has 2 divisors, whose sum is σ = 1011234392. Its totient is φ = 1011234390.

The previous prime is 1011234377. The next prime is 1011234403. The reversal of 1011234391 is 1934321101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1011234391 - 2⁹ = 1011233879 is a prime.

It is a super-2 number, since 2×1011234391² = 2045189987082281762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011231391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505617195 + 505617196.

It is an arithmetic number, because the mean of its divisors is an integer number (505617196).

Almost surely, 2^1011234391 is an apocalyptic number.

1011234391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011234391 is an equidigital number, since it uses as much as digits as its factorization.

1011234391 is an evil number, because the sum of its binary digits is even.

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

The square root of 1011234391 is about 31799.9118080538. The cubic root of 1011234391 is about 1003.7308603706.

Adding to 1011234391 its reverse (1934321101), we get a palindrome (2945555492).

The spelling of 1011234391 in words is "one billion, eleven million, two hundred thirty-four thousand, three hundred ninety-one".