97906637 has 4 divisors (see below), whose sum is σ = 97934460. Its totient is φ = 97878816.

The previous prime is 97906619. The next prime is 97906643. The reversal of 97906637 is 73660979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73660979 = 7 ⋅10522997.

It can be written as a sum of positive squares in 2 ways, for example, as 30846916 + 67059721 = 5554^2 + 8189^2 .

It is a cyclic number.

It is not a de Polignac number, because 97906637 - 2⁶ = 97906573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97906591 and 97906600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97906667) 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, 7712 + ... + 15977.

It is an arithmetic number, because the mean of its divisors is an integer number (24483615).

Almost surely, 2^97906637 is an apocalyptic number.

It is an amenable number.

97906637 is a deficient number, since it is larger than the sum of its proper divisors (27823).

97906637 is a wasteful number, since it uses less digits than its factorization.

97906637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27822.

The product of its (nonzero) digits is 428652, while the sum is 47.

The square root of 97906637 is about 9894.7782693702. The cubic root of 97906637 is about 460.8971731078.

The spelling of 97906637 in words is "ninety-seven million, nine hundred six thousand, six hundred thirty-seven".