103279921 has 2 divisors, whose sum is σ = 103279922. Its totient is φ = 103279920.

The previous prime is 103279909. The next prime is 103279927. The reversal of 103279921 is 129972301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71639296 + 31640625 = 8464^2 + 5625^2 .

It is a cyclic number.

It is not a de Polignac number, because 103279921 - 2⁷ = 103279793 is a prime.

It is not a weakly prime, because it can be changed into another prime (103279927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51639960 + 51639961.

It is an arithmetic number, because the mean of its divisors is an integer number (51639961).

Almost surely, 2^103279921 is an apocalyptic number.

It is an amenable number.

103279921 is a deficient number, since it is larger than the sum of its proper divisors (1).

103279921 is an equidigital number, since it uses as much as digits as its factorization.

103279921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 103279921 is about 10162.6729259580. The cubic root of 103279921 is about 469.1790724660.

The spelling of 103279921 in words is "one hundred three million, two hundred seventy-nine thousand, nine hundred twenty-one".