1203097561 has 2 divisors, whose sum is σ = 1203097562. Its totient is φ = 1203097560.

The previous prime is 1203097517. The next prime is 1203097573. The reversal of 1203097561 is 1657903021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1201038336 + 2059225 = 34656^2 + 1435^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203097561 - 2⁷ = 1203097433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1203097061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601548780 + 601548781.

It is an arithmetic number, because the mean of its divisors is an integer number (601548781).

Almost surely, 2^1203097561 is an apocalyptic number.

It is an amenable number.

1203097561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203097561 is an equidigital number, since it uses as much as digits as its factorization.

1203097561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 1203097561 is about 34685.6967783552. The cubic root of 1203097561 is about 1063.5721307239.

The spelling of 1203097561 in words is "one billion, two hundred three million, ninety-seven thousand, five hundred sixty-one".