1057615409 has 2 divisors, whose sum is σ = 1057615410. Its totient is φ = 1057615408.

The previous prime is 1057615393. The next prime is 1057615453. The reversal of 1057615409 is 9045167501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994014784 + 63600625 = 31528^2 + 7975^2 .

It is an emirp because it is prime and its reverse (9045167501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1057615409 - 2⁴ = 1057615393 is a prime.

It is a super-2 number, since 2×1057615409² = 2237100706708474562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1057615469) 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, 528807704 + 528807705.

It is an arithmetic number, because the mean of its divisors is an integer number (528807705).

Almost surely, 2^1057615409 is an apocalyptic number.

It is an amenable number.

1057615409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1057615409 is an equidigital number, since it uses as much as digits as its factorization.

1057615409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 1057615409 is about 32520.9995080102. Note that the first 3 decimals coincide. The cubic root of 1057615409 is about 1018.8476698911.

The spelling of 1057615409 in words is "one billion, fifty-seven million, six hundred fifteen thousand, four hundred nine".