79000421 has 2 divisors, whose sum is σ = 79000422. Its totient is φ = 79000420.

The previous prime is 79000409. The next prime is 79000433. The reversal of 79000421 is 12400097.

It is a balanced prime because it is at equal distance from previous prime (79000409) and next prime (79000433).

It can be written as a sum of positive squares in only one way, i.e., 74632321 + 4368100 = 8639^2 + 2090^2 .

It is an emirp because it is prime and its reverse (12400097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79000421 - 2²² = 74806117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79000021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39500210 + 39500211.

It is an arithmetic number, because the mean of its divisors is an integer number (39500211).

Almost surely, 2^79000421 is an apocalyptic number.

It is an amenable number.

79000421 is a deficient number, since it is larger than the sum of its proper divisors (1).

79000421 is an equidigital number, since it uses as much as digits as its factorization.

79000421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 79000421 is about 8888.2181003844. The cubic root of 79000421 is about 429.0848049138.

The spelling of 79000421 in words is "seventy-nine million, four hundred twenty-one", and thus it is an aban number.