79917853 has 2 divisors, whose sum is σ = 79917854. Its totient is φ = 79917852.

The previous prime is 79917841. The next prime is 79917863. The reversal of 79917853 is 35871997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76685049 + 3232804 = 8757^2 + 1798^2 .

It is a cyclic number.

It is not a de Polignac number, because 79917853 - 2¹⁷ = 79786781 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79917797 and 79917806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79917863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39958926 + 39958927.

It is an arithmetic number, because the mean of its divisors is an integer number (39958927).

Almost surely, 2^79917853 is an apocalyptic number.

It is an amenable number.

79917853 is a deficient number, since it is larger than the sum of its proper divisors (1).

79917853 is an equidigital number, since it uses as much as digits as its factorization.

79917853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 79917853 is about 8939.6785736401. The cubic root of 79917853 is about 430.7394038749.

The spelling of 79917853 in words is "seventy-nine million, nine hundred seventeen thousand, eight hundred fifty-three".