104779021 has 2 divisors, whose sum is σ = 104779022. Its totient is φ = 104779020.

The previous prime is 104779009. The next prime is 104779033. The reversal of 104779021 is 120977401.

It is a balanced prime because it is at equal distance from previous prime (104779009) and next prime (104779033).

It can be written as a sum of positive squares in only one way, i.e., 76370121 + 28408900 = 8739^2 + 5330^2 .

It is a cyclic number.

It is not a de Polignac number, because 104779021 - 2⁷ = 104778893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (104779061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52389510 + 52389511.

It is an arithmetic number, because the mean of its divisors is an integer number (52389511).

Almost surely, 2^104779021 is an apocalyptic number.

It is an amenable number.

104779021 is a deficient number, since it is larger than the sum of its proper divisors (1).

104779021 is an equidigital number, since it uses as much as digits as its factorization.

104779021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 104779021 is about 10236.1624156712. The cubic root of 104779021 is about 471.4382096197.

The spelling of 104779021 in words is "one hundred four million, seven hundred seventy-nine thousand, twenty-one".