753972221 has 2 divisors, whose sum is σ = 753972222. Its totient is φ = 753972220.

The previous prime is 753972209. The next prime is 753972229. The reversal of 753972221 is 122279357.

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., 705168025 + 48804196 = 26555^2 + 6986^2 .

It is an emirp because it is prime and its reverse (122279357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 753972221 - 2⁶ = 753972157 is a prime.

It is a super-2 number, since 2×753972221² = 1136948220079345682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (753972229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 376986110 + 376986111.

It is an arithmetic number, because the mean of its divisors is an integer number (376986111).

Almost surely, 2^753972221 is an apocalyptic number.

It is an amenable number.

753972221 is a deficient number, since it is larger than the sum of its proper divisors (1).

753972221 is an equidigital number, since it uses as much as digits as its factorization.

753972221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 753972221 is about 27458.5546050771. The cubic root of 753972221 is about 910.1614739823.

The spelling of 753972221 in words is "seven hundred fifty-three million, nine hundred seventy-two thousand, two hundred twenty-one".