3260990981 has 4 divisors (see below), whose sum is σ = 3268522572. Its totient is φ = 3253459392.

The previous prime is 3260990933. The next prime is 3260991001. The reversal of 3260990981 is 1890990623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1890990623 = 27743 ⋅68161.

It can be written as a sum of positive squares in 2 ways, for example, as 1485717025 + 1775273956 = 38545^2 + 42134^2 .

It is a cyclic number.

It is not a de Polignac number, because 3260990981 - 2²² = 3256796677 is a prime.

It is a super-2 number, since 2×3260990981² = 21268124356326684722, 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 (3260990921) 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, 3765146 + ... + 3766011.

It is an arithmetic number, because the mean of its divisors is an integer number (817130643).

Almost surely, 2^3260990981 is an apocalyptic number.

It is an amenable number.

3260990981 is a deficient number, since it is larger than the sum of its proper divisors (7531591).

3260990981 is an equidigital number, since it uses as much as digits as its factorization.

3260990981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7531590.

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 3260990981 is about 57105.0871726854. The cubic root of 3260990981 is about 1482.9159368568.

The spelling of 3260990981 in words is "three billion, two hundred sixty million, nine hundred ninety thousand, nine hundred eighty-one".