99940143 has 12 divisors (see below), whose sum is σ = 135621528. Its totient is φ = 65445840.

The previous prime is 99940121. The next prime is 99940151. The reversal of 99940143 is 34104999.

It is a de Polignac number, because none of the positive numbers 2^k-99940143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99940163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134868 + ... + 135606.

It is an arithmetic number, because the mean of its divisors is an integer number (11301794).

Almost surely, 2^99940143 is an apocalyptic number.

99940143 is a deficient number, since it is larger than the sum of its proper divisors (35681385).

99940143 is an frugal number, since it uses more digits than its factorization.

99940143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 99940143 is about 9997.0067020084. The cubic root of 99940143 is about 464.0662543496.

The spelling of 99940143 in words is "ninety-nine million, nine hundred forty thousand, one hundred forty-three".