97763221 has 4 divisors (see below), whose sum is σ = 98419500. Its totient is φ = 97106944.

The previous prime is 97763219. The next prime is 97763233. The reversal of 97763221 is 12236779.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50566321 + 47196900 = 7111^2 + 6870^2 .

It is a cyclic number.

It is not a de Polignac number, because 97763221 - 2¹ = 97763219 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97763201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327916 + ... + 328213.

It is an arithmetic number, because the mean of its divisors is an integer number (24604875).

Almost surely, 2^97763221 is an apocalyptic number.

It is an amenable number.

97763221 is a deficient number, since it is larger than the sum of its proper divisors (656279).

97763221 is a wasteful number, since it uses less digits than its factorization.

97763221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656278.

The product of its digits is 31752, while the sum is 37.

The square root of 97763221 is about 9887.5285587451. The cubic root of 97763221 is about 460.6720187081.

The spelling of 97763221 in words is "ninety-seven million, seven hundred sixty-three thousand, two hundred twenty-one".