53279861 has 2 divisors, whose sum is σ = 53279862. Its totient is φ = 53279860.

The previous prime is 53279833. The next prime is 53279879. The reversal of 53279861 is 16897235.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48302500 + 4977361 = 6950^2 + 2231^2 .

It is a cyclic number.

It is not a de Polignac number, because 53279861 - 2⁶ = 53279797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53279461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26639930 + 26639931.

It is an arithmetic number, because the mean of its divisors is an integer number (26639931).

Almost surely, 2^53279861 is an apocalyptic number.

It is an amenable number.

53279861 is a deficient number, since it is larger than the sum of its proper divisors (1).

53279861 is an equidigital number, since it uses as much as digits as its factorization.

53279861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 53279861 is about 7299.3055149103. The cubic root of 53279861 is about 376.2885710063.

The spelling of 53279861 in words is "fifty-three million, two hundred seventy-nine thousand, eight hundred sixty-one".