52978769 has 2 divisors, whose sum is σ = 52978770. Its totient is φ = 52978768.

The previous prime is 52978753. The next prime is 52978787. The reversal of 52978769 is 96787925.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50239744 + 2739025 = 7088^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 52978769 - 2⁴ = 52978753 is a prime.

It is a super-2 number, since 2×52978769² = 5613499929510722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52978769.

It is not a weakly prime, because it can be changed into another prime (52978799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26489384 + 26489385.

It is an arithmetic number, because the mean of its divisors is an integer number (26489385).

Almost surely, 2^52978769 is an apocalyptic number.

It is an amenable number.

52978769 is a deficient number, since it is larger than the sum of its proper divisors (1).

52978769 is an equidigital number, since it uses as much as digits as its factorization.

52978769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1905120, while the sum is 53.

The square root of 52978769 is about 7278.6515921563. The cubic root of 52978769 is about 375.5784116774.

The spelling of 52978769 in words is "fifty-two million, nine hundred seventy-eight thousand, seven hundred sixty-nine".