79257133 has 2 divisors, whose sum is σ = 79257134. Its totient is φ = 79257132.

The previous prime is 79257131. The next prime is 79257137. The reversal of 79257133 is 33175297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67683529 + 11573604 = 8227^2 + 3402^2 .

It is a cyclic number.

It is not a de Polignac number, because 79257133 - 2¹ = 79257131 is a prime.

Together with 79257131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 79257092 and 79257101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79257131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39628566 + 39628567.

It is an arithmetic number, because the mean of its divisors is an integer number (39628567).

Almost surely, 2^79257133 is an apocalyptic number.

It is an amenable number.

79257133 is a deficient number, since it is larger than the sum of its proper divisors (1).

79257133 is an equidigital number, since it uses as much as digits as its factorization.

79257133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 37.

The square root of 79257133 is about 8902.6475275617. The cubic root of 79257133 is about 429.5490729932.

The spelling of 79257133 in words is "seventy-nine million, two hundred fifty-seven thousand, one hundred thirty-three".