296887561 has 2 divisors, whose sum is σ = 296887562. Its totient is φ = 296887560.

The previous prime is 296887543. The next prime is 296887567. The reversal of 296887561 is 165788692.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250905600 + 45981961 = 15840^2 + 6781^2 .

It is a cyclic number.

It is not a de Polignac number, because 296887561 - 2⁷ = 296887433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 296887499 and 296887508.

It is not a weakly prime, because it can be changed into another prime (296887567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148443780 + 148443781.

It is an arithmetic number, because the mean of its divisors is an integer number (148443781).

Almost surely, 2^296887561 is an apocalyptic number.

It is an amenable number.

296887561 is a deficient number, since it is larger than the sum of its proper divisors (1).

296887561 is an equidigital number, since it uses as much as digits as its factorization.

296887561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The square root of 296887561 is about 17230.4254445443. The cubic root of 296887561 is about 667.1098205511.

It can be divided in two parts, 29688 and 7561, that added together give a square (37249 = 193²).

The spelling of 296887561 in words is "two hundred ninety-six million, eight hundred eighty-seven thousand, five hundred sixty-one".