99957019 has 4 divisors (see below), whose sum is σ = 100105344. Its totient is φ = 99808696.

The previous prime is 99956999. The next prime is 99957023. The reversal of 99957019 is 91075999.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99957019 is a prime.

It is a super-3 number, since 3×99957019³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99957049) 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, 73147 + ... + 74500.

It is an arithmetic number, because the mean of its divisors is an integer number (25026336).

Almost surely, 2^99957019 is an apocalyptic number.

99957019 is a deficient number, since it is larger than the sum of its proper divisors (148325).

99957019 is a wasteful number, since it uses less digits than its factorization.

99957019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148324.

The product of its (nonzero) digits is 229635, while the sum is 49.

The square root of 99957019 is about 9997.8507190296. The cubic root of 99957019 is about 464.0923737883.

The spelling of 99957019 in words is "ninety-nine million, nine hundred fifty-seven thousand, nineteen".