53643397 has 2 divisors, whose sum is σ = 53643398. Its totient is φ = 53643396.

The previous prime is 53643389. The next prime is 53643407. The reversal of 53643397 is 79334635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53012961 + 630436 = 7281^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 53643397 - 2³ = 53643389 is a prime.

It is a super-2 number, since 2×53643397² = 5755228083399218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53643097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26821698 + 26821699.

It is an arithmetic number, because the mean of its divisors is an integer number (26821699).

Almost surely, 2^53643397 is an apocalyptic number.

It is an amenable number.

53643397 is a deficient number, since it is larger than the sum of its proper divisors (1).

53643397 is an equidigital number, since it uses as much as digits as its factorization.

53643397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 40.

The square root of 53643397 is about 7324.1652766715. The cubic root of 53643397 is about 377.1424551996.

The spelling of 53643397 in words is "fifty-three million, six hundred forty-three thousand, three hundred ninety-seven".