1498510991 has 2 divisors, whose sum is σ = 1498510992. Its totient is φ = 1498510990.

The previous prime is 1498510987. The next prime is 1498511051. The reversal of 1498510991 is 1990158941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1498510991 - 2² = 1498510987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1498510961) 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, 749255495 + 749255496.

It is an arithmetic number, because the mean of its divisors is an integer number (749255496).

Almost surely, 2^1498510991 is an apocalyptic number.

1498510991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1498510991 is an equidigital number, since it uses as much as digits as its factorization.

1498510991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 47.

The square root of 1498510991 is about 38710.6056656312. The cubic root of 1498510991 is about 1144.3353416376.

The spelling of 1498510991 in words is "one billion, four hundred ninety-eight million, five hundred ten thousand, nine hundred ninety-one".