99747679 has 4 divisors (see below), whose sum is σ = 99786960. Its totient is φ = 99708400.

The previous prime is 99747673. The next prime is 99747689. The reversal of 99747679 is 97674799.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99747679 - 2¹⁹ = 99223391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99747673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15547 + ... + 21004.

It is an arithmetic number, because the mean of its divisors is an integer number (24946740).

Almost surely, 2^99747679 is an apocalyptic number.

99747679 is a deficient number, since it is larger than the sum of its proper divisors (39281).

99747679 is a wasteful number, since it uses less digits than its factorization.

99747679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39280.

The product of its digits is 6001128, while the sum is 58.

The square root of 99747679 is about 9987.3759817081. The cubic root of 99747679 is about 463.7681644428.

The spelling of 99747679 in words is "ninety-nine million, seven hundred forty-seven thousand, six hundred seventy-nine".