99271786 has 4 divisors (see below), whose sum is σ = 148907682. Its totient is φ = 49635892.

The previous prime is 99271771. The next prime is 99271787. The reversal of 99271786 is 68717299.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68717299 = 7 ⋅9816757.

It can be written as a sum of positive squares in only one way, i.e., 69405561 + 29866225 = 8331^2 + 5465^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (99271787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24817945 + ... + 24817948.

Almost surely, 2^99271786 is an apocalyptic number.

99271786 is a deficient number, since it is larger than the sum of its proper divisors (49635896).

99271786 is a wasteful number, since it uses less digits than its factorization.

99271786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49635895.

The product of its digits is 381024, while the sum is 49.

The square root of 99271786 is about 9963.5227705867. The cubic root of 99271786 is about 463.0294473478.

The spelling of 99271786 in words is "ninety-nine million, two hundred seventy-one thousand, seven hundred eighty-six".