99931471 has 2 divisors, whose sum is σ = 99931472. Its totient is φ = 99931470.

The previous prime is 99931451. The next prime is 99931501. The reversal of 99931471 is 17413999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99931471 - 2⁵ = 99931439 is a prime.

It is a super-3 number, since 3×99931471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99931411) 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 as a sum of consecutive naturals, namely, 49965735 + 49965736.

It is an arithmetic number, because the mean of its divisors is an integer number (49965736).

Almost surely, 2^99931471 is an apocalyptic number.

99931471 is a deficient number, since it is larger than the sum of its proper divisors (1).

99931471 is an equidigital number, since it uses as much as digits as its factorization.

99931471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 99931471 is about 9996.5729627708. The cubic root of 99931471 is about 464.0528313184.

The spelling of 99931471 in words is "ninety-nine million, nine hundred thirty-one thousand, four hundred seventy-one".