97980287 has 4 divisors (see below), whose sum is σ = 98117280. Its totient is φ = 97843296.

The previous prime is 97980277. The next prime is 97980313. The reversal of 97980287 is 78208979.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 97980287 - 2⁸ = 97980031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97980257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67418 + ... + 68855.

It is an arithmetic number, because the mean of its divisors is an integer number (24529320).

Almost surely, 2^97980287 is an apocalyptic number.

97980287 is a deficient number, since it is larger than the sum of its proper divisors (136993).

97980287 is a wasteful number, since it uses less digits than its factorization.

97980287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136992.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 97980287 is about 9898.4992296812. The cubic root of 97980287 is about 461.0127136870.

The spelling of 97980287 in words is "ninety-seven million, nine hundred eighty thousand, two hundred eighty-seven".