7721473 has 8 divisors (see below), whose sum is σ = 7851008. Its totient is φ = 7593264.

The previous prime is 7721459. The next prime is 7721477. The reversal of 7721473 is 3741277.

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 7721473 - 2¹³ = 7713281 is a prime.

It is a super-2 number, since 2×7721473² = 119242290579458, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7721477) 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, 20515 + ... + 20887.

It is an arithmetic number, because the mean of its divisors is an integer number (981376).

Almost surely, 2^7721473 is an apocalyptic number.

It is an amenable number.

7721473 is a deficient number, since it is larger than the sum of its proper divisors (129535).

7721473 is a wasteful number, since it uses less digits than its factorization.

7721473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663.

The product of its digits is 8232, while the sum is 31.

The square root of 7721473 is about 2778.7538573972. The cubic root of 7721473 is about 197.6514716864.

The spelling of 7721473 in words is "seven million, seven hundred twenty-one thousand, four hundred seventy-three".