971818 has 4 divisors (see below), whose sum is σ = 1457730. Its totient is φ = 485908.

The previous prime is 971783. The next prime is 971821. The reversal of 971818 is 818179.

971818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818179 = 23 ⋅35573.

It can be written as a sum of positive squares in only one way, i.e., 499849 + 471969 = 707^2 + 687^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242953 + ... + 242956.

2⁹⁷¹⁸¹⁸ is an apocalyptic number.

971818 is a deficient number, since it is larger than the sum of its proper divisors (485912).

971818 is a wasteful number, since it uses less digits than its factorization.

971818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485911.

The product of its digits is 4032, while the sum is 34.

The square root of 971818 is about 985.8082977943. The cubic root of 971818 is about 99.0516344599.

The spelling of 971818 in words is "nine hundred seventy-one thousand, eight hundred eighteen".