104547721 has 2 divisors, whose sum is σ = 104547722. Its totient is φ = 104547720.

The previous prime is 104547683. The next prime is 104547727. The reversal of 104547721 is 127745401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53582400 + 50965321 = 7320^2 + 7139^2 .

It is a cyclic number.

It is not a de Polignac number, because 104547721 - 2¹⁹ = 104023433 is a prime.

It is not a weakly prime, because it can be changed into another prime (104547727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52273860 + 52273861.

It is an arithmetic number, because the mean of its divisors is an integer number (52273861).

Almost surely, 2^104547721 is an apocalyptic number.

It is an amenable number.

104547721 is a deficient number, since it is larger than the sum of its proper divisors (1).

104547721 is an equidigital number, since it uses as much as digits as its factorization.

104547721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 104547721 is about 10224.8579941239. The cubic root of 104547721 is about 471.0910536291.

The spelling of 104547721 in words is "one hundred four million, five hundred forty-seven thousand, seven hundred twenty-one".