1238046391 has 2 divisors, whose sum is σ = 1238046392. Its totient is φ = 1238046390.

The previous prime is 1238046377. The next prime is 1238046401. The reversal of 1238046391 is 1936408321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1238046391 - 2¹³ = 1238038199 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1238046391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1238046311) 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, 619023195 + 619023196.

It is an arithmetic number, because the mean of its divisors is an integer number (619023196).

Almost surely, 2^1238046391 is an apocalyptic number.

1238046391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1238046391 is an equidigital number, since it uses as much as digits as its factorization.

1238046391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1238046391 is about 35185.8834051385. The cubic root of 1238046391 is about 1073.7725715888.

The spelling of 1238046391 in words is "one billion, two hundred thirty-eight million, forty-six thousand, three hundred ninety-one".