97620752221 has 4 divisors (see below), whose sum is σ = 97624393344. Its totient is φ = 97617111100.

The previous prime is 97620752219. The next prime is 97620752231. The reversal of 97620752221 is 12225702679.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97620752221 - 2¹ = 97620752219 is a prime.

It is a super-2 number, since 2×97620752221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97620752231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780045 + ... + 1834066.

It is an arithmetic number, because the mean of its divisors is an integer number (24406098336).

Almost surely, 2^97620752221 is an apocalyptic number.

It is an amenable number.

97620752221 is a deficient number, since it is larger than the sum of its proper divisors (3641123).

97620752221 is a wasteful number, since it uses less digits than its factorization.

97620752221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641122.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 97620752221 in words is "ninety-seven billion, six hundred twenty million, seven hundred fifty-two thousand, two hundred twenty-one".