2404091861 has 2 divisors, whose sum is σ = 2404091862. Its totient is φ = 2404091860.

The previous prime is 2404091857. The next prime is 2404091887. The reversal of 2404091861 is 1681904042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2404038961 + 52900 = 49031^2 + 230^2 .

It is a cyclic number.

It is not a de Polignac number, because 2404091861 - 2² = 2404091857 is a prime.

It is a super-2 number, since 2×2404091861² = 11559315352252886642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2404051861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1202045930 + 1202045931.

It is an arithmetic number, because the mean of its divisors is an integer number (1202045931).

Almost surely, 2^2404091861 is an apocalyptic number.

It is an amenable number.

2404091861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2404091861 is an equidigital number, since it uses as much as digits as its factorization.

2404091861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 2404091861 is about 49031.5394516632. The cubic root of 2404091861 is about 1339.6263644178.

The spelling of 2404091861 in words is "two billion, four hundred four million, ninety-one thousand, eight hundred sixty-one".