97823551 has 24 divisors (see below), whose sum is σ = 117210240. Its totient is φ = 81374832.

The previous prime is 97823521. The next prime is 97823599. The reversal of 97823551 is 15532879.

It is not a de Polignac number, because 97823551 - 2⁵ = 97823519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97823501) 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 23 ways as a sum of consecutive naturals, for example, 272310 + ... + 272668.

It is an arithmetic number, because the mean of its divisors is an integer number (4883760).

Almost surely, 2^97823551 is an apocalyptic number.

97823551 is a deficient number, since it is larger than the sum of its proper divisors (19386689).

97823551 is a wasteful number, since it uses less digits than its factorization.

97823551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 516 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The square root of 97823551 is about 9890.5789011564. The cubic root of 97823551 is about 460.7667599535.

The spelling of 97823551 in words is "ninety-seven million, eight hundred twenty-three thousand, five hundred fifty-one".