1339089491 has 2 divisors, whose sum is σ = 1339089492. Its totient is φ = 1339089490.

The previous prime is 1339089457. The next prime is 1339089497. The reversal of 1339089491 is 1949809331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1339089491 - 2¹⁴ = 1339073107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1339089497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669544745 + 669544746.

It is an arithmetic number, because the mean of its divisors is an integer number (669544746).

Almost surely, 2^1339089491 is an apocalyptic number.

1339089491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1339089491 is an equidigital number, since it uses as much as digits as its factorization.

1339089491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 1339089491 is about 36593.5717169013. The cubic root of 1339089491 is about 1102.2240103216.

The spelling of 1339089491 in words is "one billion, three hundred thirty-nine million, eighty-nine thousand, four hundred ninety-one".