1203704661 has 4 divisors (see below), whose sum is σ = 1604939552. Its totient is φ = 802469772.

The previous prime is 1203704657. The next prime is 1203704681. The reversal of 1203704661 is 1664073021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1203704661 - 2² = 1203704657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203704641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200617441 + ... + 200617446.

It is an arithmetic number, because the mean of its divisors is an integer number (401234888).

Almost surely, 2^1203704661 is an apocalyptic number.

It is an amenable number.

1203704661 is a deficient number, since it is larger than the sum of its proper divisors (401234891).

1203704661 is an equidigital number, since it uses as much as digits as its factorization.

1203704661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401234890.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 1203704661 is about 34694.4471205408. The cubic root of 1203704661 is about 1063.7509984742.

Adding to 1203704661 its reverse (1664073021), we get a palindrome (2867777682).

The spelling of 1203704661 in words is "one billion, two hundred three million, seven hundred four thousand, six hundred sixty-one".