79703989 has 4 divisors (see below), whose sum is σ = 79723980. Its totient is φ = 79684000.

The previous prime is 79703971. The next prime is 79704011. The reversal of 79703989 is 98930797.

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

It can be written as a sum of positive squares in 2 ways, for example, as 49914225 + 29789764 = 7065^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 79703989 - 2¹⁹ = 79179701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79703929) 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, 1744 + ... + 12745.

It is an arithmetic number, because the mean of its divisors is an integer number (19930995).

Almost surely, 2^79703989 is an apocalyptic number.

It is an amenable number.

79703989 is a deficient number, since it is larger than the sum of its proper divisors (19991).

79703989 is a wasteful number, since it uses less digits than its factorization.

79703989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19990.

The product of its (nonzero) digits is 857304, while the sum is 52.

The square root of 79703989 is about 8927.7090566393. The cubic root of 79703989 is about 430.3548342075.

The spelling of 79703989 in words is "seventy-nine million, seven hundred three thousand, nine hundred eighty-nine".