79870451 has 2 divisors, whose sum is σ = 79870452. Its totient is φ = 79870450.

The previous prime is 79870447. The next prime is 79870487. The reversal of 79870451 is 15407897.

It is a weak prime.

It is an emirp because it is prime and its reverse (15407897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79870451 - 2² = 79870447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79870399 and 79870408.

It is not a weakly prime, because it can be changed into another prime (79870151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39935225 + 39935226.

It is an arithmetic number, because the mean of its divisors is an integer number (39935226).

Almost surely, 2^79870451 is an apocalyptic number.

79870451 is a deficient number, since it is larger than the sum of its proper divisors (1).

79870451 is an equidigital number, since it uses as much as digits as its factorization.

79870451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 79870451 is about 8937.0269665029. The cubic root of 79870451 is about 430.6542249625.

The spelling of 79870451 in words is "seventy-nine million, eight hundred seventy thousand, four hundred fifty-one".