1641503497 has 2 divisors, whose sum is σ = 1641503498. Its totient is φ = 1641503496.

The previous prime is 1641503453. The next prime is 1641503509. The reversal of 1641503497 is 7943051461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1025024256 + 616479241 = 32016^2 + 24829^2 .

It is a cyclic number.

It is not a de Polignac number, because 1641503497 - 2¹⁵ = 1641470729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641503597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820751748 + 820751749.

It is an arithmetic number, because the mean of its divisors is an integer number (820751749).

Almost surely, 2^1641503497 is an apocalyptic number.

It is an amenable number.

1641503497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641503497 is an equidigital number, since it uses as much as digits as its factorization.

1641503497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1641503497 is about 40515.4723161412. The cubic root of 1641503497 is about 1179.6339707864.

The spelling of 1641503497 in words is "one billion, six hundred forty-one million, five hundred three thousand, four hundred ninety-seven".