53203639 has 2 divisors, whose sum is σ = 53203640. Its totient is φ = 53203638.

The previous prime is 53203621. The next prime is 53203643. The reversal of 53203639 is 93630235.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53203639 - 2⁵ = 53203607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53203639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53203699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26601819 + 26601820.

It is an arithmetic number, because the mean of its divisors is an integer number (26601820).

Almost surely, 2^53203639 is an apocalyptic number.

53203639 is a deficient number, since it is larger than the sum of its proper divisors (1).

53203639 is an equidigital number, since it uses as much as digits as its factorization.

53203639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 31.

The square root of 53203639 is about 7294.0824645736. The cubic root of 53203639 is about 376.1090462916.

The spelling of 53203639 in words is "fifty-three million, two hundred three thousand, six hundred thirty-nine".