97077221 has 2 divisors, whose sum is σ = 97077222. Its totient is φ = 97077220.

The previous prime is 97077209. The next prime is 97077247. The reversal of 97077221 is 12277079.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93508900 + 3568321 = 9670^2 + 1889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97077221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97077271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48538610 + 48538611.

It is an arithmetic number, because the mean of its divisors is an integer number (48538611).

Almost surely, 2^97077221 is an apocalyptic number.

It is an amenable number.

97077221 is a deficient number, since it is larger than the sum of its proper divisors (1).

97077221 is an equidigital number, since it uses as much as digits as its factorization.

97077221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12348, while the sum is 35.

The square root of 97077221 is about 9852.7773241863. Note that the first 3 decimals coincide. The cubic root of 97077221 is about 459.5919838207.

The spelling of 97077221 in words is "ninety-seven million, seventy-seven thousand, two hundred twenty-one".