1499389391 has 2 divisors, whose sum is σ = 1499389392. Its totient is φ = 1499389390.

The previous prime is 1499389387. The next prime is 1499389447. The reversal of 1499389391 is 1939839941.

It is an a-pointer prime, because the next prime (1499389447) can be obtained adding 1499389391 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1499389391 - 2² = 1499389387 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1499389301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 749694695 + 749694696.

It is an arithmetic number, because the mean of its divisors is an integer number (749694696).

Almost surely, 2^1499389391 is an apocalyptic number.

1499389391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1499389391 is an equidigital number, since it uses as much as digits as its factorization.

1499389391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 56.

The square root of 1499389391 is about 38721.9497313862. The cubic root of 1499389391 is about 1144.5588941790.

The spelling of 1499389391 in words is "one billion, four hundred ninety-nine million, three hundred eighty-nine thousand, three hundred ninety-one".