52906981 has 2 divisors, whose sum is σ = 52906982. Its totient is φ = 52906980.

The previous prime is 52906979. The next prime is 52906993. The reversal of 52906981 is 18960925.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52794756 + 112225 = 7266^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 52906981 - 2¹ = 52906979 is a prime.

It is a super-2 number, since 2×52906981² = 5598297277068722, which contains 22 as substring.

Together with 52906979, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52906901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26453490 + 26453491.

It is an arithmetic number, because the mean of its divisors is an integer number (26453491).

Almost surely, 2^52906981 is an apocalyptic number.

It is an amenable number.

52906981 is a deficient number, since it is larger than the sum of its proper divisors (1).

52906981 is an equidigital number, since it uses as much as digits as its factorization.

52906981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 52906981 is about 7273.7185125629. The cubic root of 52906981 is about 375.4086945697.

The spelling of 52906981 in words is "fifty-two million, nine hundred six thousand, nine hundred eighty-one".