1001306981 has 4 divisors (see below), whose sum is σ = 1011028512. Its totient is φ = 991585452.

The previous prime is 1001306959. The next prime is 1001306993. The reversal of 1001306981 is 1896031001.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1896031001 = 83 ⋅22843747.

It is a cyclic number.

It is not a de Polignac number, because 1001306981 - 2¹⁰ = 1001305957 is a prime.

It is a super-2 number, since 2×1001306981² = 2005231340398668722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001306951) 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, 4860611 + ... + 4860816.

It is an arithmetic number, because the mean of its divisors is an integer number (252757128).

Almost surely, 2^1001306981 is an apocalyptic number.

It is an amenable number.

1001306981 is a deficient number, since it is larger than the sum of its proper divisors (9721531).

1001306981 is an equidigital number, since it uses as much as digits as its factorization.

1001306981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9721530.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 1001306981 is about 31643.4350379348. The cubic root of 1001306981 is about 1000.4354706711.

Adding to 1001306981 its reverse (1896031001), we get a palindrome (2897337982).

The spelling of 1001306981 in words is "one billion, one million, three hundred six thousand, nine hundred eighty-one".