99814990 has 32 divisors (see below), whose sum is σ = 207533664. Its totient is φ = 34160640.

The previous prime is 99814987. The next prime is 99814993. The reversal of 99814990 is 9941899.

It is an interprime number because it is at equal distance from previous prime (99814987) and next prime (99814993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99814993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24819 + ... + 28558.

It is an arithmetic number, because the mean of its divisors is an integer number (6485427).

Almost surely, 2^99814990 is an apocalyptic number.

99814990 is an abundant number, since it is smaller than the sum of its proper divisors (107718674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99814990 is a wasteful number, since it uses less digits than its factorization.

99814990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53412.

The product of its (nonzero) digits is 209952, while the sum is 49.

The square root of 99814990 is about 9990.7452174500. The cubic root of 99814990 is about 463.8724598679.

It can be divided in two parts, 9981 and 4990, that multiplied together give a triangular number (49805190 = T₉₉₈₀).

The spelling of 99814990 in words is "ninety-nine million, eight hundred fourteen thousand, nine hundred ninety".