1491438833 has 2 divisors, whose sum is σ = 1491438834. Its totient is φ = 1491438832.

The previous prime is 1491438811. The next prime is 1491438847. The reversal of 1491438833 is 3388341941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1346669809 + 144769024 = 36697^2 + 12032^2 .

It is a cyclic number.

It is not a de Polignac number, because 1491438833 - 2¹⁰ = 1491437809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1491438803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745719416 + 745719417.

It is an arithmetic number, because the mean of its divisors is an integer number (745719417).

Almost surely, 2^1491438833 is an apocalyptic number.

It is an amenable number.

1491438833 is a deficient number, since it is larger than the sum of its proper divisors (1).

1491438833 is an equidigital number, since it uses as much as digits as its factorization.

1491438833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 44.

The square root of 1491438833 is about 38619.1511170300. The cubic root of 1491438833 is about 1142.5322884129.

The spelling of 1491438833 in words is "one billion, four hundred ninety-one million, four hundred thirty-eight thousand, eight hundred thirty-three".