99931061 has 2 divisors, whose sum is σ = 99931062. Its totient is φ = 99931060.

The previous prime is 99931057. The next prime is 99931099. The reversal of 99931061 is 16013999.

It is an a-pointer prime, because the next prime (99931099) can be obtained adding 99931061 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88472836 + 11458225 = 9406^2 + 3385^2 .

It is an emirp because it is prime and its reverse (16013999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99931061 - 2² = 99931057 is a prime.

It is a super-3 number, since 3×99931061³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99931001) 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, 49965530 + 49965531.

It is an arithmetic number, because the mean of its divisors is an integer number (49965531).

Almost surely, 2^99931061 is an apocalyptic number.

It is an amenable number.

99931061 is a deficient number, since it is larger than the sum of its proper divisors (1).

99931061 is an equidigital number, since it uses as much as digits as its factorization.

99931061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 99931061 is about 9996.5524557219. The cubic root of 99931061 is about 464.0521966771.

The spelling of 99931061 in words is "ninety-nine million, nine hundred thirty-one thousand, sixty-one".