971890 has 16 divisors (see below), whose sum is σ = 1852632. Its totient is φ = 365824.

The previous prime is 971863. The next prime is 971899. The reversal of 971890 is 98179.

It can be written as a sum of positive squares in 4 ways, for example, as 900601 + 71289 = 949^2 + 267^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a zygodrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971899) 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 in 7 ways as a sum of consecutive naturals, for example, 2689 + ... + 3028.

2⁹⁷¹⁸⁹⁰ is an apocalyptic number.

971890 is a deficient number, since it is larger than the sum of its proper divisors (880742).

971890 is a wasteful number, since it uses less digits than its factorization.

971890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 971890 is about 985.8448153741. The cubic root of 971890 is about 99.0540805769.

The spelling of 971890 in words is "nine hundred seventy-one thousand, eight hundred ninety".