79353257 has 4 divisors (see below), whose sum is σ = 79373136. Its totient is φ = 79333380.

The previous prime is 79353227. The next prime is 79353269. The reversal of 79353257 is 75235397.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75235397 = 109 ⋅690233.

It is a cyclic number.

It is not a de Polignac number, because 79353257 - 2¹² = 79349161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79353217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643 + ... + 12704.

It is an arithmetic number, because the mean of its divisors is an integer number (19843284).

Almost surely, 2^79353257 is an apocalyptic number.

It is an amenable number.

79353257 is a deficient number, since it is larger than the sum of its proper divisors (19879).

79353257 is a wasteful number, since it uses less digits than its factorization.

79353257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19878.

The product of its digits is 198450, while the sum is 41.

The square root of 79353257 is about 8908.0445104411. The cubic root of 79353257 is about 429.7226569237.

The spelling of 79353257 in words is "seventy-nine million, three hundred fifty-three thousand, two hundred fifty-seven".