97141781 has 8 divisors (see below), whose sum is σ = 106946400. Its totient is φ = 87499440.

The previous prime is 97141777. The next prime is 97141799. The reversal of 97141781 is 18714179.

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 97141781 - 2² = 97141777 is a prime.

It is a super-2 number, since 2×97141781² = 18873051231703922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97141711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39311 + ... + 41708.

It is an arithmetic number, because the mean of its divisors is an integer number (13368300).

Almost surely, 2^97141781 is an apocalyptic number.

It is an amenable number.

97141781 is a deficient number, since it is larger than the sum of its proper divisors (9804619).

97141781 is a wasteful number, since it uses less digits than its factorization.

97141781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81139.

The product of its digits is 14112, while the sum is 38.

The square root of 97141781 is about 9856.0530132503. The cubic root of 97141781 is about 459.6938432240.

It can be divided in two parts, 9714178 and 1, that added together give a palindrome (9714179).

The spelling of 97141781 in words is "ninety-seven million, one hundred forty-one thousand, seven hundred eighty-one".