3925212649 has 4 divisors (see below), whose sum is σ = 3925633680. Its totient is φ = 3924791620.

The previous prime is 3925212647. The next prime is 3925212659. The reversal of 3925212649 is 9462125293.

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: 9462125293 = 191 ⋅49539923.

It is a cyclic number.

It is not a de Polignac number, because 3925212649 - 2¹ = 3925212647 is a prime.

It is a super-4 number, since 4×3925212649⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3925212647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196207 + ... + 215284.

It is an arithmetic number, because the mean of its divisors is an integer number (981408420).

Almost surely, 2^3925212649 is an apocalyptic number.

It is an amenable number.

3925212649 is a deficient number, since it is larger than the sum of its proper divisors (421031).

3925212649 is an equidigital number, since it uses as much as digits as its factorization.

3925212649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421030.

The product of its digits is 233280, while the sum is 43.

The square root of 3925212649 is about 62651.5175315012. The cubic root of 3925212649 is about 1577.4456200723.

The spelling of 3925212649 in words is "three billion, nine hundred twenty-five million, two hundred twelve thousand, six hundred forty-nine".