99990903 has 8 divisors (see below), whose sum is σ = 137622016. Its totient is φ = 64510200.

The previous prime is 99990893. The next prime is 99990911. The reversal of 99990903 is 30909999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99990903 - 2⁴ = 99990887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990973) 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, 537493 + ... + 537678.

It is an arithmetic number, because the mean of its divisors is an integer number (17202752).

Almost surely, 2^99990903 is an apocalyptic number.

99990903 is a gapful number since it is divisible by the number (93) formed by its first and last digit.

99990903 is a deficient number, since it is larger than the sum of its proper divisors (37631113).

99990903 is a wasteful number, since it uses less digits than its factorization.

99990903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075205.

The product of its (nonzero) digits is 177147, while the sum is 48.

The square root of 99990903 is about 9999.5451396551. The cubic root of 99990903 is about 464.1448080899.

The spelling of 99990903 in words is "ninety-nine million, nine hundred ninety thousand, nine hundred three".