79297989 has 4 divisors (see below), whose sum is σ = 105730656. Its totient is φ = 52865324.

The previous prime is 79297961. The next prime is 79298003. The reversal of 79297989 is 98979297.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98979297 = 3 ⋅32993099.

It is a cyclic number.

It is not a de Polignac number, because 79297989 - 2¹³ = 79289797 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79297489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13216329 + ... + 13216334.

It is an arithmetic number, because the mean of its divisors is an integer number (26432664).

Almost surely, 2^79297989 is an apocalyptic number.

It is an amenable number.

79297989 is a deficient number, since it is larger than the sum of its proper divisors (26432667).

79297989 is a wasteful number, since it uses less digits than its factorization.

79297989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26432666.

The product of its digits is 5143824, while the sum is 60.

The square root of 79297989 is about 8904.9418302424. The cubic root of 79297989 is about 429.6228692627.

The spelling of 79297989 in words is "seventy-nine million, two hundred ninety-seven thousand, nine hundred eighty-nine".