7721053 has 2 divisors, whose sum is σ = 7721054. Its totient is φ = 7721052.

The previous prime is 7721029. The next prime is 7721057. The reversal of 7721053 is 3501277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4235364 + 3485689 = 2058^2 + 1867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7721053 is a prime.

It is a super-2 number, since 2×7721053² = 119229318857618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7721057) 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, 3860526 + 3860527.

It is an arithmetic number, because the mean of its divisors is an integer number (3860527).

Almost surely, 2^7721053 is an apocalyptic number.

It is an amenable number.

7721053 is a deficient number, since it is larger than the sum of its proper divisors (1).

7721053 is an equidigital number, since it uses as much as digits as its factorization.

7721053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 7721053 is about 2778.6782829252. The cubic root of 7721053 is about 197.6478879521.

The spelling of 7721053 in words is "seven million, seven hundred twenty-one thousand, fifty-three".