53688491 has 2 divisors, whose sum is σ = 53688492. Its totient is φ = 53688490.

The previous prime is 53688487. The next prime is 53688539. The reversal of 53688491 is 19488635.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53688491 - 2² = 53688487 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (53688421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26844245 + 26844246.

It is an arithmetic number, because the mean of its divisors is an integer number (26844246).

Almost surely, 2^53688491 is an apocalyptic number.

53688491 is a deficient number, since it is larger than the sum of its proper divisors (1).

53688491 is an equidigital number, since it uses as much as digits as its factorization.

53688491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 44.

The square root of 53688491 is about 7327.2430695317. The cubic root of 53688491 is about 377.2481041056.

The spelling of 53688491 in words is "fifty-three million, six hundred eighty-eight thousand, four hundred ninety-one".