53291389 has 2 divisors, whose sum is σ = 53291390. Its totient is φ = 53291388.

The previous prime is 53291377. The next prime is 53291411. The reversal of 53291389 is 98319235.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49942489 + 3348900 = 7067^2 + 1830^2 .

It is a cyclic number.

It is not a de Polignac number, because 53291389 - 2⁷ = 53291261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53291309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26645694 + 26645695.

It is an arithmetic number, because the mean of its divisors is an integer number (26645695).

Almost surely, 2^53291389 is an apocalyptic number.

It is an amenable number.

53291389 is a deficient number, since it is larger than the sum of its proper divisors (1).

53291389 is an equidigital number, since it uses as much as digits as its factorization.

53291389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The square root of 53291389 is about 7300.0951363664. The cubic root of 53291389 is about 376.3157078503.

The spelling of 53291389 in words is "fifty-three million, two hundred ninety-one thousand, three hundred eighty-nine".