1338941971 has 2 divisors, whose sum is σ = 1338941972. Its totient is φ = 1338941970.

The previous prime is 1338941959. The next prime is 1338941993. The reversal of 1338941971 is 1791498331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1338941971 - 2⁷ = 1338941843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1338941921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669470985 + 669470986.

It is an arithmetic number, because the mean of its divisors is an integer number (669470986).

Almost surely, 2^1338941971 is an apocalyptic number.

1338941971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338941971 is an equidigital number, since it uses as much as digits as its factorization.

1338941971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 1338941971 is about 36591.5560068167. The cubic root of 1338941971 is about 1102.1835335502.

The spelling of 1338941971 in words is "one billion, three hundred thirty-eight million, nine hundred forty-one thousand, nine hundred seventy-one".