7274168821 has 2 divisors, whose sum is σ = 7274168822. Its totient is φ = 7274168820.

The previous prime is 7274168813. The next prime is 7274168849. The reversal of 7274168821 is 1288614727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7256654596 + 17514225 = 85186^2 + 4185^2 .

It is a cyclic number.

It is not a de Polignac number, because 7274168821 - 2³ = 7274168813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7274168021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3637084410 + 3637084411.

It is an arithmetic number, because the mean of its divisors is an integer number (3637084411).

Almost surely, 2^7274168821 is an apocalyptic number.

It is an amenable number.

7274168821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7274168821 is an equidigital number, since it uses as much as digits as its factorization.

7274168821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 301056, while the sum is 46.

The square root of 7274168821 is about 85288.7379493917. The cubic root of 7274168821 is about 1937.5866136015.

The spelling of 7274168821 in words is "seven billion, two hundred seventy-four million, one hundred sixty-eight thousand, eight hundred twenty-one".