99705861 has 12 divisors (see below), whose sum is σ = 147912492. Its totient is φ = 64673856.

The previous prime is 99705839. The next prime is 99705871. The reversal of 99705861 is 16850799.

It can be written as a sum of positive squares in 2 ways, for example, as 92448225 + 7257636 = 9615^2 + 2694^2 .

It is not a de Polignac number, because 99705861 - 2⁵ = 99705829 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99705871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149376 + ... + 150041.

It is an arithmetic number, because the mean of its divisors is an integer number (12326041).

Almost surely, 2^99705861 is an apocalyptic number.

It is an amenable number.

99705861 is a deficient number, since it is larger than the sum of its proper divisors (48206631).

99705861 is a wasteful number, since it uses less digits than its factorization.

99705861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299460 (or 299457 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 99705861 is about 9985.2822193466. The cubic root of 99705861 is about 463.7033456649.

The spelling of 99705861 in words is "ninety-nine million, seven hundred five thousand, eight hundred sixty-one".