721065469 has 8 divisors (see below), whose sum is σ = 730800000. Its totient is φ = 711346272.

The previous prime is 721065467. The next prime is 721065497. The reversal of 721065469 is 964560127.

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 721065469 - 2¹ = 721065467 is a prime.

It is a super-2 number, since 2×721065469² = 1039870821168379922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721065467) 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, 115377 + ... + 121465.

It is an arithmetic number, because the mean of its divisors is an integer number (91350000).

Almost surely, 2^721065469 is an apocalyptic number.

721065469 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

It is an amenable number.

721065469 is a deficient number, since it is larger than the sum of its proper divisors (9734531).

721065469 is a wasteful number, since it uses less digits than its factorization.

721065469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7667.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 721065469 is about 26852.6622330077. The cubic root of 721065469 is about 896.7228423199.

The spelling of 721065469 in words is "seven hundred twenty-one million, sixty-five thousand, four hundred sixty-nine".