53149387 has 2 divisors, whose sum is σ = 53149388. Its totient is φ = 53149386.

The previous prime is 53149363. The next prime is 53149471. The reversal of 53149387 is 78394135.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53149387 is a prime.

It is not a weakly prime, because it can be changed into another prime (53149357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26574693 + 26574694.

It is an arithmetic number, because the mean of its divisors is an integer number (26574694).

Almost surely, 2^53149387 is an apocalyptic number.

53149387 is a deficient number, since it is larger than the sum of its proper divisors (1).

53149387 is an equidigital number, since it uses as much as digits as its factorization.

53149387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 53149387 is about 7290.3626110091. The cubic root of 53149387 is about 375.9811627616.

The spelling of 53149387 in words is "fifty-three million, one hundred forty-nine thousand, three hundred eighty-seven".