3970516261 has 4 divisors (see below), whose sum is σ = 3970644300. Its totient is φ = 3970388224.

The previous prime is 3970516259. The next prime is 3970516267. The reversal of 3970516261 is 1626150793.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1626150793 = 17 ⋅95655929.

It can be written as a sum of positive squares in 2 ways, for example, as 272052036 + 3698464225 = 16494^2 + 60815^2 .

It is a cyclic number.

It is not a de Polignac number, because 3970516261 - 2¹ = 3970516259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3970516267) 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, 15045 + ... + 90373.

It is an arithmetic number, because the mean of its divisors is an integer number (992661075).

Almost surely, 2^3970516261 is an apocalyptic number.

It is an amenable number.

3970516261 is a deficient number, since it is larger than the sum of its proper divisors (128039).

3970516261 is an equidigital number, since it uses as much as digits as its factorization.

3970516261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128038.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 3970516261 is about 63012.0326683722. The cubic root of 3970516261 is about 1583.4912199439.

The spelling of 3970516261 in words is "three billion, nine hundred seventy million, five hundred sixteen thousand, two hundred sixty-one".