97037440021 has 4 divisors (see below), whose sum is σ = 97039856844. Its totient is φ = 97035023200.

The previous prime is 97037439979. The next prime is 97037440051. The reversal of 97037440021 is 12004473079.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12004473079 = 349 ⋅34396771.

It can be written as a sum of positive squares in 2 ways, for example, as 68966112996 + 28071327025 = 262614^2 + 167545^2 .

It is a cyclic number.

It is not a de Polignac number, because 97037440021 - 2¹⁵ = 97037407253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97037440051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1147150 + ... + 1228831.

It is an arithmetic number, because the mean of its divisors is an integer number (24259964211).

Almost surely, 2^97037440021 is an apocalyptic number.

It is an amenable number.

97037440021 is a deficient number, since it is larger than the sum of its proper divisors (2416823).

97037440021 is a wasteful number, since it uses less digits than its factorization.

97037440021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2416822.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 97037440021 in words is "ninety-seven billion, thirty-seven million, four hundred forty thousand, twenty-one".