572779409 has 2 divisors, whose sum is σ = 572779410. Its totient is φ = 572779408.

The previous prime is 572779399. The next prime is 572779411. The reversal of 572779409 is 904977275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569872384 + 2907025 = 23872^2 + 1705^2 .

It is a cyclic number.

It is not a de Polignac number, because 572779409 - 2⁸ = 572779153 is a prime.

Together with 572779411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (572775409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286389704 + 286389705.

It is an arithmetic number, because the mean of its divisors is an integer number (286389705).

Almost surely, 2^572779409 is an apocalyptic number.

It is an amenable number.

572779409 is a deficient number, since it is larger than the sum of its proper divisors (1).

572779409 is an equidigital number, since it uses as much as digits as its factorization.

572779409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 50.

The square root of 572779409 is about 23932.8103030129. The cubic root of 572779409 is about 830.4799126154.

The spelling of 572779409 in words is "five hundred seventy-two million, seven hundred seventy-nine thousand, four hundred nine".