97866019531 has 8 divisors (see below), whose sum is σ = 112262669280. Its totient is φ = 83573317248.

The previous prime is 97866019529. The next prime is 97866019627. The reversal of 97866019531 is 13591066879.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97866019531 - 2¹ = 97866019529 is a prime.

It is a super-2 number, since 2×97866019531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97866059531) 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 7 ways as a sum of consecutive naturals, for example, 25984846 + ... + 25988611.

It is an arithmetic number, because the mean of its divisors is an integer number (14032833660).

Almost surely, 2^97866019531 is an apocalyptic number.

97866019531 is a deficient number, since it is larger than the sum of its proper divisors (14396649749).

97866019531 is a wasteful number, since it uses less digits than its factorization.

97866019531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51973733.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 97866019531 in words is "ninety-seven billion, eight hundred sixty-six million, nineteen thousand, five hundred thirty-one".