53149979 has 2 divisors, whose sum is σ = 53149980. Its totient is φ = 53149978.

The previous prime is 53149969. The next prime is 53149991. The reversal of 53149979 is 97994135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53149979 - 2¹⁶ = 53084443 is a prime.

It is a super-3 number, since 3×53149979³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53149909) 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, 26574989 + 26574990.

It is an arithmetic number, because the mean of its divisors is an integer number (26574990).

Almost surely, 2^53149979 is an apocalyptic number.

53149979 is a deficient number, since it is larger than the sum of its proper divisors (1).

53149979 is an equidigital number, since it uses as much as digits as its factorization.

53149979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 47.

The square root of 53149979 is about 7290.4032124431. The cubic root of 53149979 is about 375.9825587013.

The spelling of 53149979 in words is "fifty-three million, one hundred forty-nine thousand, nine hundred seventy-nine".