99708381 has 32 divisors (see below), whose sum is σ = 154936320. Its totient is φ = 63253872.

The previous prime is 99708379. The next prime is 99708397. The reversal of 99708381 is 18380799.

99708381 is a nontrivial binomial coefficient, being equal to C(14122, 2).

It is not a de Polignac number, because 99708381 - 2¹ = 99708379 is a prime.

It is a super-2 number, since 2×99708381² = 19883522483282322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99708331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190386 + ... + 190908.

It is an arithmetic number, because the mean of its divisors is an integer number (4841760).

Almost surely, 2^99708381 is an apocalyptic number.

99708381 is the 14121-st triangular number and also the 7061-st hexagonal number.

It is an amenable number.

99708381 is a deficient number, since it is larger than the sum of its proper divisors (55227939).

99708381 is a wasteful number, since it uses less digits than its factorization.

99708381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 99708381 is about 9985.4084042667. The cubic root of 99708381 is about 463.7072522309.

The spelling of 99708381 in words is "ninety-nine million, seven hundred eight thousand, three hundred eighty-one".