99997707 has 4 divisors (see below), whose sum is σ = 133330280. Its totient is φ = 66665136.

The previous prime is 99997691. The next prime is 99997759. The reversal of 99997707 is 70779999.

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

It is not a de Polignac number, because 99997707 - 2⁴ = 99997691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99997907) 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, 16666282 + ... + 16666287.

It is an arithmetic number, because the mean of its divisors is an integer number (33332570).

Almost surely, 2^99997707 is an apocalyptic number.

99997707 is a deficient number, since it is larger than the sum of its proper divisors (33332573).

99997707 is a wasteful number, since it uses less digits than its factorization.

99997707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33332572.

The product of its (nonzero) digits is 2250423, while the sum is 57.

The square root of 99997707 is about 9999.8853493428. The cubic root of 99997707 is about 464.1553356131.

The spelling of 99997707 in words is "ninety-nine million, nine hundred ninety-seven thousand, seven hundred seven".