53640427 has 2 divisors, whose sum is σ = 53640428. Its totient is φ = 53640426.

The previous prime is 53640421. The next prime is 53640437. The reversal of 53640427 is 72404635.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53640427 - 2²³ = 45251819 is a prime.

It is a super-4 number, since 4×53640427⁴ (a number of 32 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (53640421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26820213 + 26820214.

It is an arithmetic number, because the mean of its divisors is an integer number (26820214).

Almost surely, 2^53640427 is an apocalyptic number.

53640427 is a deficient number, since it is larger than the sum of its proper divisors (1).

53640427 is an equidigital number, since it uses as much as digits as its factorization.

53640427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 53640427 is about 7323.9625203847. The cubic root of 53640427 is about 377.1354948290.

The spelling of 53640427 in words is "fifty-three million, six hundred forty thousand, four hundred twenty-seven".