99997653 has 32 divisors (see below), whose sum is σ = 155990016. Its totient is φ = 55804608.

The previous prime is 99997649. The next prime is 99997669. The reversal of 99997653 is 35679999.

It is not a de Polignac number, because 99997653 - 2² = 99997649 is a prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 99997593 and 99997602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99996653) 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 31 ways as a sum of consecutive naturals, for example, 179251 + ... + 179807.

It is an arithmetic number, because the mean of its divisors is an integer number (4874688).

Almost surely, 2^99997653 is an apocalyptic number.

It is an amenable number.

99997653 is a deficient number, since it is larger than the sum of its proper divisors (55992363).

99997653 is a wasteful number, since it uses less digits than its factorization.

99997653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753.

The product of its digits is 4133430, while the sum is 57.

The square root of 99997653 is about 9999.8826493114. The cubic root of 99997653 is about 464.1552520632.

The spelling of 99997653 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred fifty-three".