79009946 has 4 divisors (see below), whose sum is σ = 118514922. Its totient is φ = 39504972.

The previous prime is 79009937. The next prime is 79009967. The reversal of 79009946 is 64990097.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64990097 = 97 ⋅670001.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 4791721 = 8615^2 + 2189^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 79009897 and 79009906.

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, 19752485 + ... + 19752488.

Almost surely, 2^79009946 is an apocalyptic number.

79009946 is a deficient number, since it is larger than the sum of its proper divisors (39504976).

79009946 is a wasteful number, since it uses less digits than its factorization.

79009946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39504975.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 79009946 is about 8888.7539059195. The cubic root of 79009946 is about 429.1020489929.

The spelling of 79009946 in words is "seventy-nine million, nine thousand, nine hundred forty-six".