99973990 has 16 divisors (see below), whose sum is σ = 184343040. Its totient is φ = 39014080.

The previous prime is 99973987. The next prime is 99973997. The reversal of 99973990 is 9937999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99973997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121510 + ... + 122329.

It is an arithmetic number, because the mean of its divisors is an integer number (11521440).

Almost surely, 2^99973990 is an apocalyptic number.

99973990 is a deficient number, since it is larger than the sum of its proper divisors (84369050).

99973990 is a wasteful number, since it uses less digits than its factorization.

99973990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243887.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 99973990 is about 9998.6994154240. The cubic root of 99973990 is about 464.1186372966.

The spelling of 99973990 in words is "ninety-nine million, nine hundred seventy-three thousand, nine hundred ninety".