79067621 has 2 divisors, whose sum is σ = 79067622. Its totient is φ = 79067620.

The previous prime is 79067617. The next prime is 79067623. The reversal of 79067621 is 12676097.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75777025 + 3290596 = 8705^2 + 1814^2 .

It is a cyclic number.

It is not a de Polignac number, because 79067621 - 2² = 79067617 is a prime.

Together with 79067623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79067623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39533810 + 39533811.

It is an arithmetic number, because the mean of its divisors is an integer number (39533811).

Almost surely, 2^79067621 is an apocalyptic number.

It is an amenable number.

79067621 is a deficient number, since it is larger than the sum of its proper divisors (1).

79067621 is an equidigital number, since it uses as much as digits as its factorization.

79067621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 79067621 is about 8891.9975820959. The cubic root of 79067621 is about 429.2064343371.

The spelling of 79067621 in words is "seventy-nine million, sixty-seven thousand, six hundred twenty-one".