99943331 has 2 divisors, whose sum is σ = 99943332. Its totient is φ = 99943330.

The previous prime is 99943307. The next prime is 99943339. The reversal of 99943331 is 13334999.

It is a strong prime.

It is an emirp because it is prime and its reverse (13334999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99943331 - 2⁶ = 99943267 is a prime.

It is a super-2 number, since 2×99943331² = 19977338822751122, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99943339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49971665 + 49971666.

It is an arithmetic number, because the mean of its divisors is an integer number (49971666).

Almost surely, 2^99943331 is an apocalyptic number.

99943331 is a deficient number, since it is larger than the sum of its proper divisors (1).

99943331 is an equidigital number, since it uses as much as digits as its factorization.

99943331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 41.

The square root of 99943331 is about 9997.1661484643. The cubic root of 99943331 is about 464.0711887281.

The spelling of 99943331 in words is "ninety-nine million, nine hundred forty-three thousand, three hundred thirty-one".