99992381 has 2 divisors, whose sum is σ = 99992382. Its totient is φ = 99992380.

The previous prime is 99992363. The next prime is 99992401. The reversal of 99992381 is 18329999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51912025 + 48080356 = 7205^2 + 6934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99992381 is a prime.

It is a super-2 number, since 2×99992381² = 19996952516098322, which contains 22 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 (99992311) 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, 49996190 + 49996191.

It is an arithmetic number, because the mean of its divisors is an integer number (49996191).

Almost surely, 2^99992381 is an apocalyptic number.

It is an amenable number.

99992381 is a deficient number, since it is larger than the sum of its proper divisors (1).

99992381 is an equidigital number, since it uses as much as digits as its factorization.

99992381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 50.

The square root of 99992381 is about 9999.6190427436. The cubic root of 99992381 is about 464.1470949734.

The spelling of 99992381 in words is "ninety-nine million, nine hundred ninety-two thousand, three hundred eighty-one".