97880287 has 2 divisors, whose sum is σ = 97880288. Its totient is φ = 97880286.

The previous prime is 97880239. The next prime is 97880291. The reversal of 97880287 is 78208879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 97880287 - 2¹¹ = 97878239 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 97880287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97880227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48940143 + 48940144.

It is an arithmetic number, because the mean of its divisors is an integer number (48940144).

Almost surely, 2^97880287 is an apocalyptic number.

97880287 is a deficient number, since it is larger than the sum of its proper divisors (1).

97880287 is an equidigital number, since it uses as much as digits as its factorization.

97880287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 49.

The square root of 97880287 is about 9893.4466693868. The cubic root of 97880287 is about 460.8558217055.

The spelling of 97880287 in words is "ninety-seven million, eight hundred eighty thousand, two hundred eighty-seven".