3090656721 has 8 divisors (see below), whose sum is σ = 4123186240. Its totient is φ = 2059282512.

The previous prime is 3090656713. The next prime is 3090656749. The reversal of 3090656721 is 1276560903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3090656721 - 2³ = 3090656713 is a prime.

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 3090656721.

It is not an unprimeable number, because it can be changed into a prime (3090656771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282565 + ... + 293298.

It is an arithmetic number, because the mean of its divisors is an integer number (515398280).

Almost surely, 2^3090656721 is an apocalyptic number.

It is an amenable number.

3090656721 is a deficient number, since it is larger than the sum of its proper divisors (1032529519).

3090656721 is a wasteful number, since it uses less digits than its factorization.

3090656721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577655.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 3090656721 is about 55593.6751888198. The cubic root of 3090656721 is about 1456.6333764249.

The spelling of 3090656721 in words is "three billion, ninety million, six hundred fifty-six thousand, seven hundred twenty-one".