9902345 has 4 divisors (see below), whose sum is σ = 11882820. Its totient is φ = 7921872.

The previous prime is 9902327. The next prime is 9902353. The reversal of 9902345 is 5432099.

9902345 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5432099 = 31 ⋅175229.

It can be written as a sum of positive squares in 2 ways, for example, as 1352569 + 8549776 = 1163^2 + 2924^2 .

It is a cyclic number.

It is not a de Polignac number, because 9902345 - 2⁶ = 9902281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990230 + ... + 990239.

It is an arithmetic number, because the mean of its divisors is an integer number (2970705).

Almost surely, 2^9902345 is an apocalyptic number.

It is an amenable number.

9902345 is a deficient number, since it is larger than the sum of its proper divisors (1980475).

9902345 is a wasteful number, since it uses less digits than its factorization.

9902345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980474.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 9902345 is about 3146.7991674081. The cubic root of 9902345 is about 214.7398692753.

The spelling of 9902345 in words is "nine million, nine hundred two thousand, three hundred forty-five".