1641247523 has 2 divisors, whose sum is σ = 1641247524. Its totient is φ = 1641247522.

The previous prime is 1641247513. The next prime is 1641247577. The reversal of 1641247523 is 3257421461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1641247523 - 2²⁶ = 1574138659 is a prime.

It is not a weakly prime, because it can be changed into another prime (1641247513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820623761 + 820623762.

It is an arithmetic number, because the mean of its divisors is an integer number (820623762).

Almost surely, 2^1641247523 is an apocalyptic number.

1641247523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1641247523 is an equidigital number, since it uses as much as digits as its factorization.

1641247523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 1641247523 is about 40512.3132269684. The cubic root of 1641247523 is about 1179.5726507175.

Adding to 1641247523 its reverse (3257421461), we get a palindrome (4898668984).

The spelling of 1641247523 in words is "one billion, six hundred forty-one million, two hundred forty-seven thousand, five hundred twenty-three".