2921661293 has 8 divisors (see below), whose sum is σ = 3256341120. Its totient is φ = 2605072320.

The previous prime is 2921661283. The next prime is 2921661313. The reversal of 2921661293 is 3921661292.

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

It is a cyclic number.

It is not a de Polignac number, because 2921661293 - 2⁴ = 2921661277 is a prime.

It is a super-2 number, since 2×2921661293² = 17072209422028863698, 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 2921661293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2921661233) 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, 4522373 + ... + 4523018.

It is an arithmetic number, because the mean of its divisors is an integer number (407042640).

Almost surely, 2^2921661293 is an apocalyptic number.

It is an amenable number.

2921661293 is a deficient number, since it is larger than the sum of its proper divisors (334679827).

2921661293 is a wasteful number, since it uses less digits than its factorization.

2921661293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9045427.

The product of its digits is 69984, while the sum is 41.

The square root of 2921661293 is about 54052.3939617849. The cubic root of 2921661293 is about 1429.5849110649.

Subtracting 2921661293 from its reverse (3921661292), we obtain a palindrome (999999999).

It can be divided in two parts, 29216 and 61293, that added together give a palindrome (90509).

The spelling of 2921661293 in words is "two billion, nine hundred twenty-one million, six hundred sixty-one thousand, two hundred ninety-three".