7949902 has 4 divisors (see below), whose sum is σ = 11924856. Its totient is φ = 3974950.

The previous prime is 7949899. The next prime is 7949933. The reversal of 7949902 is 2099497.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1987474 + ... + 1987477.

It is an arithmetic number, because the mean of its divisors is an integer number (2981214).

Almost surely, 2^7949902 is an apocalyptic number.

7949902 is a deficient number, since it is larger than the sum of its proper divisors (3974954).

7949902 is a wasteful number, since it uses less digits than its factorization.

7949902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974953.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 7949902 is about 2819.5570574117. The cubic root of 7949902 is about 199.5816421604.

The spelling of 7949902 in words is "seven million, nine hundred forty-nine thousand, nine hundred two".