52969781 has 2 divisors, whose sum is σ = 52969782. Its totient is φ = 52969780.

The previous prime is 52969771. The next prime is 52969789. The reversal of 52969781 is 18796925.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45495025 + 7474756 = 6745^2 + 2734^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52969781 is a prime.

It is a super-2 number, since 2×52969781² = 5611595398375922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52969789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26484890 + 26484891.

It is an arithmetic number, because the mean of its divisors is an integer number (26484891).

Almost surely, 2^52969781 is an apocalyptic number.

It is an amenable number.

52969781 is a deficient number, since it is larger than the sum of its proper divisors (1).

52969781 is an equidigital number, since it uses as much as digits as its factorization.

52969781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 52969781 is about 7278.0341439155. The cubic root of 52969781 is about 375.5571711582.

The spelling of 52969781 in words is "fifty-two million, nine hundred sixty-nine thousand, seven hundred eighty-one".