9902434 has 4 divisors (see below), whose sum is σ = 14853654. Its totient is φ = 4951216.

The previous prime is 9902419. The next prime is 9902437. The reversal of 9902434 is 4342099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5267025 + 4635409 = 2295^2 + 2153^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9902396 and 9902405.

It is not an unprimeable number, because it can be changed into a prime (9902437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2475607 + ... + 2475610.

Almost surely, 2^9902434 is an apocalyptic number.

9902434 is a deficient number, since it is larger than the sum of its proper divisors (4951220).

9902434 is a wasteful number, since it uses less digits than its factorization.

9902434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4951219.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 9902434 is about 3146.8133087300. The cubic root of 9902434 is about 214.7405126175.

The spelling of 9902434 in words is "nine million, nine hundred two thousand, four hundred thirty-four".