99040073 has 12 divisors (see below), whose sum is σ = 109452084. Its totient is φ = 89548800.

The previous prime is 99040069. The next prime is 99040087. The reversal of 99040073 is 37004099.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68425984 + 30614089 = 8272^2 + 5533^2 .

It is not a de Polignac number, because 99040073 - 2² = 99040069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99040013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21233 + ... + 25473.

It is an arithmetic number, because the mean of its divisors is an integer number (9121007).

Almost surely, 2^99040073 is an apocalyptic number.

It is an amenable number.

99040073 is a deficient number, since it is larger than the sum of its proper divisors (10412011).

99040073 is a wasteful number, since it uses less digits than its factorization.

99040073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456 (or 4445 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 99040073 is about 9951.8879113463. The cubic root of 99040073 is about 462.6689101089.

The spelling of 99040073 in words is "ninety-nine million, forty thousand, seventy-three".