52779191 has 2 divisors, whose sum is σ = 52779192. Its totient is φ = 52779190.

The previous prime is 52779187. The next prime is 52779193. The reversal of 52779191 is 19197725.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52779191 - 2² = 52779187 is a prime.

It is a super-2 number, since 2×52779191² = 5571286005228962, which contains 22 as substring.

Together with 52779193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52779193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26389595 + 26389596.

It is an arithmetic number, because the mean of its divisors is an integer number (26389596).

Almost surely, 2^52779191 is an apocalyptic number.

52779191 is a deficient number, since it is larger than the sum of its proper divisors (1).

52779191 is an equidigital number, since it uses as much as digits as its factorization.

52779191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39690, while the sum is 41.

The square root of 52779191 is about 7264.9288365407. The cubic root of 52779191 is about 375.1062004396.

The spelling of 52779191 in words is "fifty-two million, seven hundred seventy-nine thousand, one hundred ninety-one".