971981337601 has 4 divisors (see below), whose sum is σ = 973387968304. Its totient is φ = 970574706900.

The previous prime is 971981337599. The next prime is 971981337631. The reversal of 971981337601 is 106733189179.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 971981337601 - 2¹ = 971981337599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971981337631) 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, 703314315 + ... + 703315696.

It is an arithmetic number, because the mean of its divisors is an integer number (243346992076).

Almost surely, 2^971981337601 is an apocalyptic number.

It is an amenable number.

971981337601 is a deficient number, since it is larger than the sum of its proper divisors (1406630703).

971981337601 is a wasteful number, since it uses less digits than its factorization.

971981337601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406630702.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The spelling of 971981337601 in words is "nine hundred seventy-one billion, nine hundred eighty-one million, three hundred thirty-seven thousand, six hundred one".