97982381 has 4 divisors (see below), whose sum is σ = 111979872. Its totient is φ = 83984892.

The previous prime is 97982377. The next prime is 97982393. The reversal of 97982381 is 18328979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97982381 - 2² = 97982377 is a prime.

It is a super-2 number, since 2×97982381² = 19201093972858322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97982321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6998735 + ... + 6998748.

It is an arithmetic number, because the mean of its divisors is an integer number (27994968).

Almost surely, 2^97982381 is an apocalyptic number.

It is an amenable number.

97982381 is a deficient number, since it is larger than the sum of its proper divisors (13997491).

97982381 is a wasteful number, since it uses less digits than its factorization.

97982381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13997490.

The product of its digits is 217728, while the sum is 47.

The square root of 97982381 is about 9898.6050027264. The cubic root of 97982381 is about 461.0159978638.

The spelling of 97982381 in words is "ninety-seven million, nine hundred eighty-two thousand, three hundred eighty-one".