981607 has 4 divisors (see below), whose sum is σ = 1070856. Its totient is φ = 892360.

The previous prime is 981601. The next prime is 981623. The reversal of 981607 is 706189.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 981607 - 2³ = 981599 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

981607 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44608 + ... + 44629.

It is an arithmetic number, because the mean of its divisors is an integer number (267714).

2⁹⁸¹⁶⁰⁷ is an apocalyptic number.

981607 is a deficient number, since it is larger than the sum of its proper divisors (89249).

981607 is a wasteful number, since it uses less digits than its factorization.

981607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89248.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 981607 is about 990.7608187651. The cubic root of 981607 is about 99.3831021966.

The spelling of 981607 in words is "nine hundred eighty-one thousand, six hundred seven".