79221503 has 2 divisors, whose sum is σ = 79221504. Its totient is φ = 79221502.

The previous prime is 79221491. The next prime is 79221509. The reversal of 79221503 is 30512297.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79221503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79221509) 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 as a sum of consecutive naturals, namely, 39610751 + 39610752.

It is an arithmetic number, because the mean of its divisors is an integer number (39610752).

Almost surely, 2^79221503 is an apocalyptic number.

79221503 is a deficient number, since it is larger than the sum of its proper divisors (1).

79221503 is an equidigital number, since it uses as much as digits as its factorization.

79221503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 79221503 is about 8900.6462124949. The cubic root of 79221503 is about 429.4846954964.

The spelling of 79221503 in words is "seventy-nine million, two hundred twenty-one thousand, five hundred three".