97872277 has 2 divisors, whose sum is σ = 97872278. Its totient is φ = 97872276.

The previous prime is 97872253. The next prime is 97872317. The reversal of 97872277 is 77227879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64625521 + 33246756 = 8039^2 + 5766^2 .

It is an emirp because it is prime and its reverse (77227879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97872277 - 2⁷ = 97872149 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97872277.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97872217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48936138 + 48936139.

It is an arithmetic number, because the mean of its divisors is an integer number (48936139).

Almost surely, 2^97872277 is an apocalyptic number.

It is an amenable number.

97872277 is a deficient number, since it is larger than the sum of its proper divisors (1).

97872277 is an equidigital number, since it uses as much as digits as its factorization.

97872277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691488, while the sum is 49.

The square root of 97872277 is about 9893.0418476826. The cubic root of 97872277 is about 460.8432500361.

The spelling of 97872277 in words is "ninety-seven million, eight hundred seventy-two thousand, two hundred seventy-seven".