3951672085 has 4 divisors (see below), whose sum is σ = 4742006508. Its totient is φ = 3161337664.

The previous prime is 3951672071. The next prime is 3951672089. The reversal of 3951672085 is 5802761593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 919848241 + 3031823844 = 30329^2 + 55062^2 .

It is a cyclic number.

It is not a de Polignac number, because 3951672085 - 2¹⁵ = 3951639317 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 (3951672089) 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, 395167204 + ... + 395167213.

It is an arithmetic number, because the mean of its divisors is an integer number (1185501627).

Almost surely, 2^3951672085 is an apocalyptic number.

It is an amenable number.

3951672085 is a deficient number, since it is larger than the sum of its proper divisors (790334423).

3951672085 is an equidigital number, since it uses as much as digits as its factorization.

3951672085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790334422.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 3951672085 is about 62862.3264364277. The cubic root of 3951672085 is about 1580.9821491972.

The spelling of 3951672085 in words is "three billion, nine hundred fifty-one million, six hundred seventy-two thousand, eighty-five".