79659551 has 4 divisors (see below), whose sum is σ = 79687872. Its totient is φ = 79631232.

The previous prime is 79659523. The next prime is 79659563. The reversal of 79659551 is 15595697.

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

It is a cyclic number.

It is not a de Polignac number, because 79659551 - 2¹⁴ = 79643167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79659496 and 79659505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79659581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9410 + ... + 15743.

It is an arithmetic number, because the mean of its divisors is an integer number (19921968).

Almost surely, 2^79659551 is an apocalyptic number.

79659551 is a deficient number, since it is larger than the sum of its proper divisors (28321).

79659551 is a wasteful number, since it uses less digits than its factorization.

79659551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28320.

The product of its digits is 425250, while the sum is 47.

The square root of 79659551 is about 8925.2199412676. The cubic root of 79659551 is about 430.2748396192.

The spelling of 79659551 in words is "seventy-nine million, six hundred fifty-nine thousand, five hundred fifty-one".