614639 has 2 divisors, whose sum is σ = 614640. Its totient is φ = 614638.

The previous prime is 614633. The next prime is 614657. The reversal of 614639 is 936416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 614639 - 2⁴ = 614623 is a prime.

It is a super-2 number, since 2×614639² = 755562200642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (614633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307319 + 307320.

It is an arithmetic number, because the mean of its divisors is an integer number (307320).

2⁶¹⁴⁶³⁹ is an apocalyptic number.

614639 is a deficient number, since it is larger than the sum of its proper divisors (1).

614639 is an equidigital number, since it uses as much as digits as its factorization.

614639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 614639 is about 783.9891580883. The cubic root of 614639 is about 85.0237073433.

The spelling of 614639 in words is "six hundred fourteen thousand, six hundred thirty-nine".