99997937 has 4 divisors (see below), whose sum is σ = 107690100. Its totient is φ = 92305776.

The previous prime is 99997913. The next prime is 99997949. The reversal of 99997937 is 73979999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73979999 = 659 ⋅112261.

It can be written as a sum of positive squares in 2 ways, for example, as 54893281 + 45104656 = 7409^2 + 6716^2 .

It is a cyclic number.

It is not a de Polignac number, because 99997937 - 2⁶ = 99997873 is a prime.

It is a super-3 number, since 3×99997937³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99997937.

It is not an unprimeable number, because it can be changed into a prime (99997907) 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 3 ways as a sum of consecutive naturals, for example, 3846062 + ... + 3846087.

It is an arithmetic number, because the mean of its divisors is an integer number (26922525).

Almost surely, 2^99997937 is an apocalyptic number.

It is an amenable number.

99997937 is a deficient number, since it is larger than the sum of its proper divisors (7692163).

99997937 is a wasteful number, since it uses less digits than its factorization.

99997937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7692162.

The product of its digits is 8680203, while the sum is 62.

The square root of 99997937 is about 9999.8968494680. The cubic root of 99997937 is about 464.1556914734.

The spelling of 99997937 in words is "ninety-nine million, nine hundred ninety-seven thousand, nine hundred thirty-seven".