64620427 has 2 divisors, whose sum is σ = 64620428. Its totient is φ = 64620426.

The previous prime is 64620421. The next prime is 64620433. The reversal of 64620427 is 72402646.

It is a balanced prime because it is at equal distance from previous prime (64620421) and next prime (64620433).

It is a cyclic number.

It is not a de Polignac number, because 64620427 - 2¹⁵ = 64587659 is a prime.

It is a super-3 number, since 3×64620427³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (64620421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32310213 + 32310214.

It is an arithmetic number, because the mean of its divisors is an integer number (32310214).

Almost surely, 2^64620427 is an apocalyptic number.

64620427 is a deficient number, since it is larger than the sum of its proper divisors (1).

64620427 is an equidigital number, since it uses as much as digits as its factorization.

64620427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 64620427 is about 8038.6831633048. The cubic root of 64620427 is about 401.2884018460.

The spelling of 64620427 in words is "sixty-four million, six hundred twenty thousand, four hundred twenty-seven".