53497621 has 2 divisors, whose sum is σ = 53497622. Its totient is φ = 53497620.

The previous prime is 53497603. The next prime is 53497637. The reversal of 53497621 is 12679435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53494596 + 3025 = 7314^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 53497621 - 2¹¹ = 53495573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53497651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26748810 + 26748811.

It is an arithmetic number, because the mean of its divisors is an integer number (26748811).

Almost surely, 2^53497621 is an apocalyptic number.

It is an amenable number.

53497621 is a deficient number, since it is larger than the sum of its proper divisors (1).

53497621 is an equidigital number, since it uses as much as digits as its factorization.

53497621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 37.

The square root of 53497621 is about 7314.2067922639. The cubic root of 53497621 is about 376.8005169048.

The spelling of 53497621 in words is "fifty-three million, four hundred ninety-seven thousand, six hundred twenty-one".