53398621 has 2 divisors, whose sum is σ = 53398622. Its totient is φ = 53398620.

The previous prime is 53398619. The next prime is 53398633. The reversal of 53398621 is 12689335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52272900 + 1125721 = 7230^2 + 1061^2 .

It is a cyclic number.

It is not a de Polignac number, because 53398621 - 2¹ = 53398619 is a prime.

Together with 53398619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53398651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26699310 + 26699311.

It is an arithmetic number, because the mean of its divisors is an integer number (26699311).

Almost surely, 2^53398621 is an apocalyptic number.

It is an amenable number.

53398621 is a deficient number, since it is larger than the sum of its proper divisors (1).

53398621 is an equidigital number, since it uses as much as digits as its factorization.

53398621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 53398621 is about 7307.4360072463. The cubic root of 53398621 is about 376.5679440373.

The spelling of 53398621 in words is "fifty-three million, three hundred ninety-eight thousand, six hundred twenty-one".