8404973261 has 2 divisors, whose sum is σ = 8404973262. Its totient is φ = 8404973260.

The previous prime is 8404973221. The next prime is 8404973303. The reversal of 8404973261 is 1623794048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5735184361 + 2669788900 = 75731^2 + 51670^2 .

It is a cyclic number.

It is not a de Polignac number, because 8404973261 - 2¹⁰ = 8404972237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8404973221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202486630 + 4202486631.

It is an arithmetic number, because the mean of its divisors is an integer number (4202486631).

Almost surely, 2^8404973261 is an apocalyptic number.

It is an amenable number.

8404973261 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404973261 is an equidigital number, since it uses as much as digits as its factorization.

8404973261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 8404973261 is about 91678.6412475665. The cubic root of 8404973261 is about 2033.1938094326.

The spelling of 8404973261 in words is "eight billion, four hundred four million, nine hundred seventy-three thousand, two hundred sixty-one".