99943958 has 4 divisors (see below), whose sum is σ = 149915940. Its totient is φ = 49971978.

The previous prime is 99943913. The next prime is 99943979. The reversal of 99943958 is 85934999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85934999 = 181 ⋅474779.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24985988 + ... + 24985991.

It is an arithmetic number, because the mean of its divisors is an integer number (37478985).

Almost surely, 2^99943958 is an apocalyptic number.

99943958 is a deficient number, since it is larger than the sum of its proper divisors (49971982).

99943958 is a wasteful number, since it uses less digits than its factorization.

99943958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49971981.

The product of its digits is 3149280, while the sum is 56.

The square root of 99943958 is about 9997.1975073017. The cubic root of 99943958 is about 464.0721591848.

The spelling of 99943958 in words is "ninety-nine million, nine hundred forty-three thousand, nine hundred fifty-eight".