1115606549 has 2 divisors, whose sum is σ = 1115606550. Its totient is φ = 1115606548.

The previous prime is 1115606543. The next prime is 1115606561. The reversal of 1115606549 is 9456065111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617870449 + 497736100 = 24857^2 + 22310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115606549 - 2⁴ = 1115606533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115606543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557803274 + 557803275.

It is an arithmetic number, because the mean of its divisors is an integer number (557803275).

Almost surely, 2^1115606549 is an apocalyptic number.

It is an amenable number.

1115606549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115606549 is an equidigital number, since it uses as much as digits as its factorization.

1115606549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 1115606549 is about 33400.6968340482. The cubic root of 1115606549 is about 1037.1391261296.

The spelling of 1115606549 in words is "one billion, one hundred fifteen million, six hundred six thousand, five hundred forty-nine".