79091951 has 2 divisors, whose sum is σ = 79091952. Its totient is φ = 79091950.

The previous prime is 79091933. The next prime is 79091981. The reversal of 79091951 is 15919097.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (15919097) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79091951 - 2¹⁴ = 79075567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79091899 and 79091908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79091981) 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, 39545975 + 39545976.

It is an arithmetic number, because the mean of its divisors is an integer number (39545976).

Almost surely, 2^79091951 is an apocalyptic number.

79091951 is a deficient number, since it is larger than the sum of its proper divisors (1).

79091951 is an equidigital number, since it uses as much as digits as its factorization.

79091951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 79091951 is about 8893.3655609111. The cubic root of 79091951 is about 429.2504537115.

The spelling of 79091951 in words is "seventy-nine million, ninety-one thousand, nine hundred fifty-one".