3970978669 has 6 divisors (see below), whose sum is σ = 4619301774. Its totient is φ = 3403695960.

The previous prime is 3970978621. The next prime is 3970978769. The reversal of 3970978669 is 9668790793.

It can be written as a sum of positive squares in only one way, i.e., 2000772900 + 1970205769 = 44730^2 + 44387^2 .

It is not a de Polignac number, because 3970978669 - 2¹⁷ = 3970847597 is a prime.

It is a super-2 number, since 2×3970978669² = 31537343179306023122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3970978669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3970978369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40520142 + ... + 40520239.

It is an arithmetic number, because the mean of its divisors is an integer number (769883629).

Almost surely, 2^3970978669 is an apocalyptic number.

It is an amenable number.

3970978669 is a deficient number, since it is larger than the sum of its proper divisors (648323105).

3970978669 is an equidigital number, since it uses as much as digits as its factorization.

3970978669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81040395 (or 81040388 counting only the distinct ones).

The product of its (nonzero) digits is 30862944, while the sum is 64.

The square root of 3970978669 is about 63015.7017655124. The cubic root of 3970978669 is about 1583.5526889097.

The spelling of 3970978669 in words is "three billion, nine hundred seventy million, nine hundred seventy-eight thousand, six hundred sixty-nine".