971436881 has 4 divisors (see below), whose sum is σ = 975606372. Its totient is φ = 967267392.

The previous prime is 971436877. The next prime is 971436911. The reversal of 971436881 is 188634179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188634179 = 3259 ⋅57881.

It can be written as a sum of positive squares in 2 ways, for example, as 136515856 + 834921025 = 11684^2 + 28895^2 .

It is a cyclic number.

It is not a de Polignac number, because 971436881 - 2² = 971436877 is a prime.

It is a super-2 number, since 2×971436881² = 1887379227534016322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971436481) 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, 2084396 + ... + 2084861.

It is an arithmetic number, because the mean of its divisors is an integer number (243901593).

Almost surely, 2^971436881 is an apocalyptic number.

It is an amenable number.

971436881 is a deficient number, since it is larger than the sum of its proper divisors (4169491).

971436881 is a wasteful number, since it uses less digits than its factorization.

971436881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169490.

The product of its digits is 290304, while the sum is 47.

The square root of 971436881 is about 31167.8822026778. The cubic root of 971436881 is about 990.3868436851.

The spelling of 971436881 in words is "nine hundred seventy-one million, four hundred thirty-six thousand, eight hundred eighty-one".