889631 has 2 divisors, whose sum is σ = 889632. Its totient is φ = 889630.

The previous prime is 889597. The next prime is 889639. The reversal of 889631 is 136988.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 889631 - 2¹⁴ = 873247 is a prime.

It is a super-2 number, since 2×889631² = 1582886632322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 889591 and 889600.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 889631.

It is not a weakly prime, because it can be changed into another prime (889639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444815 + 444816.

It is an arithmetic number, because the mean of its divisors is an integer number (444816).

2⁸⁸⁹⁶³¹ is an apocalyptic number.

889631 is a deficient number, since it is larger than the sum of its proper divisors (1).

889631 is an equidigital number, since it uses as much as digits as its factorization.

889631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 889631 is about 943.2025233215. The cubic root of 889631 is about 96.1767216466.

The spelling of 889631 in words is "eight hundred eighty-nine thousand, six hundred thirty-one".