53638397 has 2 divisors, whose sum is σ = 53638398. Its totient is φ = 53638396.

The previous prime is 53638309. The next prime is 53638427. The reversal of 53638397 is 79383635.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34880836 + 18757561 = 5906^2 + 4331^2 .

It is a cyclic number.

It is not a de Polignac number, because 53638397 - 2¹⁰ = 53637373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53638307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26819198 + 26819199.

It is an arithmetic number, because the mean of its divisors is an integer number (26819199).

Almost surely, 2^53638397 is an apocalyptic number.

It is an amenable number.

53638397 is a deficient number, since it is larger than the sum of its proper divisors (1).

53638397 is an equidigital number, since it uses as much as digits as its factorization.

53638397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 44.

The square root of 53638397 is about 7323.8239328919. The cubic root of 53638397 is about 377.1307372562.

The spelling of 53638397 in words is "fifty-three million, six hundred thirty-eight thousand, three hundred ninety-seven".