79977253 has 2 divisors, whose sum is σ = 79977254. Its totient is φ = 79977252.

The previous prime is 79977199. The next prime is 79977277. The reversal of 79977253 is 35277997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79977249 + 4 = 8943^2 + 2^2 .

It is an emirp because it is prime and its reverse (35277997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79977253 - 2¹⁷ = 79846181 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79977197 and 79977206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79977353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39988626 + 39988627.

It is an arithmetic number, because the mean of its divisors is an integer number (39988627).

Almost surely, 2^79977253 is an apocalyptic number.

It is an amenable number.

79977253 is a deficient number, since it is larger than the sum of its proper divisors (1).

79977253 is an equidigital number, since it uses as much as digits as its factorization.

79977253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 833490, while the sum is 49.

The square root of 79977253 is about 8943.0002236386. Note that the first 3 decimals coincide. The cubic root of 79977253 is about 430.8460950302.

The spelling of 79977253 in words is "seventy-nine million, nine hundred seventy-seven thousand, two hundred fifty-three".