99945007 has 4 divisors (see below), whose sum is σ = 99970000. Its totient is φ = 99920016.

The previous prime is 99944981. The next prime is 99945019. The reversal of 99945007 is 70054999.

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

It is a 4-Lehmer number, since φ(99945007) divides (99945007-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 99945007 - 2¹⁹ = 99420719 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 (99945607) 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, 4998 + ... + 14995.

It is an arithmetic number, because the mean of its divisors is an integer number (24992500).

It is a Poulet number, since it divides 2^99945006-1.

Almost surely, 2^99945007 is an apocalyptic number.

99945007 is the 4999-th decagonal number.

99945007 is a deficient number, since it is larger than the sum of its proper divisors (24993).

99945007 is a wasteful number, since it uses less digits than its factorization.

99945007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24992.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 99945007 is about 9997.2499718673. The cubic root of 99945007 is about 464.0737827947.

The spelling of 99945007 in words is "ninety-nine million, nine hundred forty-five thousand, seven".