52979981 has 2 divisors, whose sum is σ = 52979982. Its totient is φ = 52979980.

The previous prime is 52979977. The next prime is 52980029. The reversal of 52979981 is 18997925.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44009956 + 8970025 = 6634^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 52979981 - 2² = 52979977 is a prime.

It is a super-2 number, since 2×52979981² = 5613756773520722, 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 (52979081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26489990 + 26489991.

It is an arithmetic number, because the mean of its divisors is an integer number (26489991).

Almost surely, 2^52979981 is an apocalyptic number.

It is an amenable number.

52979981 is a deficient number, since it is larger than the sum of its proper divisors (1).

52979981 is an equidigital number, since it uses as much as digits as its factorization.

52979981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 50.

The square root of 52979981 is about 7278.7348488594. The cubic root of 52979981 is about 375.5812757025.

The spelling of 52979981 in words is "fifty-two million, nine hundred seventy-nine thousand, nine hundred eighty-one".