99940394 has 4 divisors (see below), whose sum is σ = 149910594. Its totient is φ = 49970196.

The previous prime is 99940369. The next prime is 99940429. The reversal of 99940394 is 49304999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49304999 = 53 ⋅930283.

It can be written as a sum of positive squares in only one way, i.e., 67848169 + 32092225 = 8237^2 + 5665^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24985097 + ... + 24985100.

Almost surely, 2^99940394 is an apocalyptic number.

99940394 is a deficient number, since it is larger than the sum of its proper divisors (49970200).

99940394 is a wasteful number, since it uses less digits than its factorization.

99940394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49970199.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 99940394 is about 9997.0192557582. The cubic root of 99940394 is about 464.0666428506.

The spelling of 99940394 in words is "ninety-nine million, nine hundred forty thousand, three hundred ninety-four".