97707889 has 2 divisors, whose sum is σ = 97707890. Its totient is φ = 97707888.

The previous prime is 97707847. The next prime is 97707901. The reversal of 97707889 is 98870779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59367025 + 38340864 = 7705^2 + 6192^2 .

It is a cyclic number.

It is not a de Polignac number, because 97707889 - 2⁹ = 97707377 is a prime.

It is not a weakly prime, because it can be changed into another prime (97707829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48853944 + 48853945.

It is an arithmetic number, because the mean of its divisors is an integer number (48853945).

Almost surely, 2^97707889 is an apocalyptic number.

It is an amenable number.

97707889 is a deficient number, since it is larger than the sum of its proper divisors (1).

97707889 is an equidigital number, since it uses as much as digits as its factorization.

97707889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 97707889 is about 9884.7300924203. The cubic root of 97707889 is about 460.5850919671.

It can be divided in two parts, 97707 and 889, that added together give a square (98596 = 314²).

The spelling of 97707889 in words is "ninety-seven million, seven hundred seven thousand, eight hundred eighty-nine".