7721093 has 4 divisors (see below), whose sum is σ = 7866828. Its totient is φ = 7575360.

The previous prime is 7721071. The next prime is 7721101. The reversal of 7721093 is 3901277.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3901277 = 53 ⋅73609.

It can be written as a sum of positive squares in 2 ways, for example, as 2184484 + 5536609 = 1478^2 + 2353^2 .

It is a cyclic number.

It is not a de Polignac number, because 7721093 - 2⁶ = 7721029 is a prime.

It is a super-2 number, since 2×7721093² = 119230554229298, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7721003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72788 + ... + 72893.

It is an arithmetic number, because the mean of its divisors is an integer number (1966707).

Almost surely, 2^7721093 is an apocalyptic number.

It is an amenable number.

7721093 is a deficient number, since it is larger than the sum of its proper divisors (145735).

7721093 is a wasteful number, since it uses less digits than its factorization.

7721093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145734.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 7721093 is about 2778.6854805825. The cubic root of 7721093 is about 197.6482292657.

The spelling of 7721093 in words is "seven million, seven hundred twenty-one thousand, ninety-three".