99997902 has 96 divisors (see below), whose sum is σ = 237025152. Its totient is φ = 31562784.

The previous prime is 99997901. The next prime is 99997907. The reversal of 99997902 is 20979999.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99997901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1204753 + ... + 1204835.

It is an arithmetic number, because the mean of its divisors is an integer number (2469012).

Almost surely, 2^99997902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99997902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118512576).

99997902 is an abundant number, since it is smaller than the sum of its proper divisors (137027250).

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

99997902 is a wasteful number, since it uses less digits than its factorization.

99997902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 826686, while the sum is 54.

The square root of 99997902 is about 9999.8950994498. The cubic root of 99997902 is about 464.1556373208.

It can be divided in two parts, 99 and 997902, that added together give a square (998001 = 999²).

The spelling of 99997902 in words is "ninety-nine million, nine hundred ninety-seven thousand, nine hundred two".