79803987 has 4 divisors (see below), whose sum is σ = 106405320. Its totient is φ = 53202656.

The previous prime is 79803973. The next prime is 79803989. The reversal of 79803987 is 78930897.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78930897 = 3 ⋅26310299.

It is a cyclic number.

It is not a de Polignac number, because 79803987 - 2⁶ = 79803923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79803989) 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 in 3 ways as a sum of consecutive naturals, for example, 13300662 + ... + 13300667.

It is an arithmetic number, because the mean of its divisors is an integer number (26601330).

Almost surely, 2^79803987 is an apocalyptic number.

79803987 is a deficient number, since it is larger than the sum of its proper divisors (26601333).

79803987 is a wasteful number, since it uses less digits than its factorization.

79803987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26601332.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 79803987 is about 8933.3077300628. The cubic root of 79803987 is about 430.5347358597.

The spelling of 79803987 in words is "seventy-nine million, eight hundred three thousand, nine hundred eighty-seven".