461639 has 2 divisors, whose sum is σ = 461640. Its totient is φ = 461638.

The previous prime is 461627. The next prime is 461653. The reversal of 461639 is 936164.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 461639 - 2¹⁶ = 396103 is a prime.

It is a super-2 number, since 2×461639² = 426221132642, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230819 + 230820.

It is an arithmetic number, because the mean of its divisors is an integer number (230820).

2⁴⁶¹⁶³⁹ is an apocalyptic number.

461639 is a deficient number, since it is larger than the sum of its proper divisors (1).

461639 is an equidigital number, since it uses as much as digits as its factorization.

461639 is an evil number, because the sum of its binary digits is even.

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

The square root of 461639 is about 679.4402107618. The cubic root of 461639 is about 77.2859999850.

The spelling of 461639 in words is "four hundred sixty-one thousand, six hundred thirty-nine".