521444479 has 2 divisors, whose sum is σ = 521444480. Its totient is φ = 521444478.

The previous prime is 521444387. The next prime is 521444509. The reversal of 521444479 is 974444125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521444479 - 2¹³ = 521436287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521444579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260722239 + 260722240.

It is an arithmetic number, because the mean of its divisors is an integer number (260722240).

Almost surely, 2^521444479 is an apocalyptic number.

521444479 is a deficient number, since it is larger than the sum of its proper divisors (1).

521444479 is an equidigital number, since it uses as much as digits as its factorization.

521444479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 40.

The square root of 521444479 is about 22835.1588345691. The cubic root of 521444479 is about 804.8890599788.

The spelling of 521444479 in words is "five hundred twenty-one million, four hundred forty-four thousand, four hundred seventy-nine".