3930047661 has 32 divisors (see below), whose sum is σ = 5563514880. Its totient is φ = 2463638400.

The previous prime is 3930047657. The next prime is 3930047677. The reversal of 3930047661 is 1667400393.

It is not a de Polignac number, because 3930047661 - 2² = 3930047657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3930040661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1000860 + ... + 1004778.

It is an arithmetic number, because the mean of its divisors is an integer number (173859840).

Almost surely, 2^3930047661 is an apocalyptic number.

3930047661 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3930047661 is a deficient number, since it is larger than the sum of its proper divisors (1633467219).

3930047661 is a wasteful number, since it uses less digits than its factorization.

3930047661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 3930047661 is about 62690.0922076208. The cubic root of 3930047661 is about 1578.0930447882.

The spelling of 3930047661 in words is "three billion, nine hundred thirty million, forty-seven thousand, six hundred sixty-one".