79481938 has 4 divisors (see below), whose sum is σ = 119222910. Its totient is φ = 39740968.

The previous prime is 79481933. The next prime is 79481939. The reversal of 79481938 is 83918497.

It is a happy number.

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., 72369049 + 7112889 = 8507^2 + 2667^2 .

It is a Smith number, since the sum of its digits (49) 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 = 79481891 and 79481900.

It is not an unprimeable number, because it can be changed into a prime (79481933) by changing a digit.

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, 19870483 + ... + 19870486.

Almost surely, 2^79481938 is an apocalyptic number.

79481938 is a deficient number, since it is larger than the sum of its proper divisors (39740972).

79481938 is a wasteful number, since it uses less digits than its factorization.

79481938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39740971.

The product of its digits is 435456, while the sum is 49.

The square root of 79481938 is about 8915.2643258627. The cubic root of 79481938 is about 429.9548140729.

The spelling of 79481938 in words is "seventy-nine million, four hundred eighty-one thousand, nine hundred thirty-eight".