994780261 has 4 divisors (see below), whose sum is σ = 1021666252. Its totient is φ = 967894272.

The previous prime is 994780231. The next prime is 994780309. The reversal of 994780261 is 162087499.

994780261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 380484036 + 614296225 = 19506^2 + 24785^2 .

It is a cyclic number.

It is not a de Polignac number, because 994780261 - 2⁷ = 994780133 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 (994780231) 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, 13442940 + ... + 13443013.

It is an arithmetic number, because the mean of its divisors is an integer number (255416563).

Almost surely, 2^994780261 is an apocalyptic number.

It is an amenable number.

994780261 is a deficient number, since it is larger than the sum of its proper divisors (26885991).

994780261 is a wasteful number, since it uses less digits than its factorization.

994780261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26885990.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 994780261 is about 31540.1373015401. The cubic root of 994780261 is about 998.2570508934.

The spelling of 994780261 in words is "nine hundred ninety-four million, seven hundred eighty thousand, two hundred sixty-one".