97947381 has 16 divisors (see below), whose sum is σ = 149394944. Its totient is φ = 55916784.

The previous prime is 97947373. The next prime is 97947391. The reversal of 97947381 is 18374979.

It is not a de Polignac number, because 97947381 - 2³ = 97947373 is a prime.

It is a super-2 number, since 2×97947381² = 19187378889518322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 97947381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97947331) 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 15 ways as a sum of consecutive naturals, for example, 34830 + ... + 37536.

It is an arithmetic number, because the mean of its divisors is an integer number (9337184).

Almost surely, 2^97947381 is an apocalyptic number.

It is an amenable number.

97947381 is a deficient number, since it is larger than the sum of its proper divisors (51447563).

97947381 is a wasteful number, since it uses less digits than its factorization.

97947381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4440.

The product of its digits is 381024, while the sum is 48.

The square root of 97947381 is about 9896.8369189353. The cubic root of 97947381 is about 460.9610986007.

The spelling of 97947381 in words is "ninety-seven million, nine hundred forty-seven thousand, three hundred eighty-one".