971690 has 8 divisors (see below), whose sum is σ = 1749060. Its totient is φ = 388672.

The previous prime is 971683. The next prime is 971693. The reversal of 971690 is 96179.

It can be written as a sum of positive squares in 2 ways, for example, as 954529 + 17161 = 977^2 + 131^2 .

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

It is a super-2 number, since 2×971690² = 1888362912200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971693) 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, 48575 + ... + 48594.

2⁹⁷¹⁶⁹⁰ is an apocalyptic number.

971690 is a deficient number, since it is larger than the sum of its proper divisors (777370).

971690 is a wasteful number, since it uses less digits than its factorization.

971690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97176.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 971690 is about 985.7433743120. The cubic root of 971690 is about 99.0472855092.

It can be divided in two parts, 971 and 690, that added together give a palindrome (1661).

The spelling of 971690 in words is "nine hundred seventy-one thousand, six hundred ninety".