97286351981 has 16 divisors (see below), whose sum is σ = 119819280000. Its totient is φ = 76920954048.

The previous prime is 97286351977. The next prime is 97286352019. The reversal of 97286351981 is 18915368279.

It is a cyclic number.

It is not a de Polignac number, because 97286351981 - 2² = 97286351977 is a prime.

It is a super-2 number, since 2×97286351981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97286351981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97286351941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233606 + ... + 499143.

It is an arithmetic number, because the mean of its divisors is an integer number (7488705000).

Almost surely, 2^97286351981 is an apocalyptic number.

97286351981 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

97286351981 is a deficient number, since it is larger than the sum of its proper divisors (22532928019).

97286351981 is a wasteful number, since it uses less digits than its factorization.

97286351981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734228.

The product of its digits is 6531840, while the sum is 59.

The spelling of 97286351981 in words is "ninety-seven billion, two hundred eighty-six million, three hundred fifty-one thousand, nine hundred eighty-one".