521326963 has 2 divisors, whose sum is σ = 521326964. Its totient is φ = 521326962.

The previous prime is 521326957. The next prime is 521326979. The reversal of 521326963 is 369623125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521326963 - 2¹³ = 521318771 is a prime.

It is not a weakly prime, because it can be changed into another prime (521326903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260663481 + 260663482.

It is an arithmetic number, because the mean of its divisors is an integer number (260663482).

Almost surely, 2^521326963 is an apocalyptic number.

521326963 is a deficient number, since it is larger than the sum of its proper divisors (1).

521326963 is an equidigital number, since it uses as much as digits as its factorization.

521326963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 37.

The square root of 521326963 is about 22832.5855522321. The cubic root of 521326963 is about 804.8285904862.

It can be divided in two parts, 52132 and 6963, that added together give a palindrome (59095).

The spelling of 521326963 in words is "five hundred twenty-one million, three hundred twenty-six thousand, nine hundred sixty-three".