981629 has 8 divisors (see below), whose sum is σ = 1078272. Its totient is φ = 886240.

The previous prime is 981623. The next prime is 981637. The reversal of 981629 is 926189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981629 - 2⁸ = 981373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372 + ... + 2754.

It is an arithmetic number, because the mean of its divisors is an integer number (134784).

2⁹⁸¹⁶²⁹ is an apocalyptic number.

It is an amenable number.

981629 is a deficient number, since it is larger than the sum of its proper divisors (96643).

981629 is a wasteful number, since it uses less digits than its factorization.

981629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627.

The product of its digits is 7776, while the sum is 35.

The square root of 981629 is about 990.7719212816. The cubic root of 981629 is about 99.3838446567.

The spelling of 981629 in words is "nine hundred eighty-one thousand, six hundred twenty-nine".