97691844037 has 4 divisors (see below), whose sum is σ = 103438423116. Its totient is φ = 91945264960.

The previous prime is 97691844001. The next prime is 97691844043. The reversal of 97691844037 is 73044819679.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41440337761 + 56251506276 = 203569^2 + 237174^2 .

It is a cyclic number.

It is not a de Polignac number, because 97691844037 - 2³¹ = 95544360389 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97691844067) 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 3 ways as a sum of consecutive naturals, for example, 2873289514 + ... + 2873289547.

It is an arithmetic number, because the mean of its divisors is an integer number (25859605779).

Almost surely, 2^97691844037 is an apocalyptic number.

It is an amenable number.

97691844037 is a deficient number, since it is larger than the sum of its proper divisors (5746579079).

97691844037 is a wasteful number, since it uses less digits than its factorization.

97691844037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5746579078.

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 97691844037 in words is "ninety-seven billion, six hundred ninety-one million, eight hundred forty-four thousand, thirty-seven".