7469279821 has 2 divisors, whose sum is σ = 7469279822. Its totient is φ = 7469279820.

The previous prime is 7469279803. The next prime is 7469279861. The reversal of 7469279821 is 1289729647.

7469279821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4309266025 + 3160013796 = 65645^2 + 56214^2 .

It is a cyclic number.

It is not a de Polignac number, because 7469279821 - 2¹³ = 7469271629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7469279861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3734639910 + 3734639911.

It is an arithmetic number, because the mean of its divisors is an integer number (3734639911).

Almost surely, 2^7469279821 is an apocalyptic number.

It is an amenable number.

7469279821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7469279821 is an equidigital number, since it uses as much as digits as its factorization.

7469279821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 55.

The square root of 7469279821 is about 86424.9953485680. The cubic root of 7469279821 is about 1954.7575980791.

The spelling of 7469279821 in words is "seven billion, four hundred sixty-nine million, two hundred seventy-nine thousand, eight hundred twenty-one".