99990902 has 16 divisors (see below), whose sum is σ = 167104512. Its totient is φ = 44482920.

The previous prime is 99990893. The next prime is 99990911. The reversal of 99990902 is 20909999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (99990893) and next prime (99990911).

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47318 + ... + 49385.

It is an arithmetic number, because the mean of its divisors is an integer number (10444032).

Almost surely, 2^99990902 is an apocalyptic number.

99990902 is a deficient number, since it is larger than the sum of its proper divisors (67113610).

99990902 is a wasteful number, since it uses less digits than its factorization.

99990902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96763.

The product of its (nonzero) digits is 118098, while the sum is 47.

The square root of 99990902 is about 9999.5450896528. The cubic root of 99990902 is about 464.1448065426.

The spelling of 99990902 in words is "ninety-nine million, nine hundred ninety thousand, nine hundred two".