1115559997 has 2 divisors, whose sum is σ = 1115559998. Its totient is φ = 1115559996.

The previous prime is 1115559967. The next prime is 1115560001. The reversal of 1115559997 is 7999555111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 603488356 + 512071641 = 24566^2 + 22629^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115559997 - 2¹⁵ = 1115527229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115559917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557779998 + 557779999.

It is an arithmetic number, because the mean of its divisors is an integer number (557779999).

Almost surely, 2^1115559997 is an apocalyptic number.

It is an amenable number.

1115559997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115559997 is an equidigital number, since it uses as much as digits as its factorization.

1115559997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 637875, while the sum is 52.

The square root of 1115559997 is about 33399.9999550898. Note that the first 4 decimals coincide. The cubic root of 1115559997 is about 1037.1247000244.

The spelling of 1115559997 in words is "one billion, one hundred fifteen million, five hundred fifty-nine thousand, nine hundred ninety-seven".