2572402309 has 2 divisors, whose sum is σ = 2572402310. Its totient is φ = 2572402308.

The previous prime is 2572402307. The next prime is 2572402321. The reversal of 2572402309 is 9032042752.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1683050625 + 889351684 = 41025^2 + 29822^2 .

It is a cyclic number.

It is not a de Polignac number, because 2572402309 - 2¹ = 2572402307 is a prime.

Together with 2572402307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2572402303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1286201154 + 1286201155.

It is an arithmetic number, because the mean of its divisors is an integer number (1286201155).

Almost surely, 2^2572402309 is an apocalyptic number.

It is an amenable number.

2572402309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2572402309 is an equidigital number, since it uses as much as digits as its factorization.

2572402309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 2572402309 is about 50718.8555568834. The cubic root of 2572402309 is about 1370.1863296392.

The spelling of 2572402309 in words is "two billion, five hundred seventy-two million, four hundred two thousand, three hundred nine".