52779917 has 12 divisors (see below), whose sum is σ = 58429980. Its totient is φ = 47507328.

The previous prime is 52779911. The next prime is 52779941. The reversal of 52779917 is 71997725.

It can be written as a sum of positive squares in 2 ways, for example, as 21799561 + 30980356 = 4669^2 + 5566^2 .

It is not a de Polignac number, because 52779917 - 2²⁰ = 51731341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52779911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6059 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (4869165).

Almost surely, 2^52779917 is an apocalyptic number.

It is an amenable number.

52779917 is a deficient number, since it is larger than the sum of its proper divisors (5650063).

52779917 is a wasteful number, since it uses less digits than its factorization.

52779917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932 (or 5909 counting only the distinct ones).

The product of its digits is 277830, while the sum is 47.

The square root of 52779917 is about 7264.9788024467. The cubic root of 52779917 is about 375.1079203463.

The spelling of 52779917 in words is "fifty-two million, seven hundred seventy-nine thousand, nine hundred seventeen".