721162849 has 8 divisors (see below), whose sum is σ = 787498560. Its totient is φ = 654956400.

The previous prime is 721162829. The next prime is 721162853. The reversal of 721162849 is 948261127.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721162849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721162829) 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, 20454 + ... + 43135.

It is an arithmetic number, because the mean of its divisors is an integer number (98437320).

Almost surely, 2^721162849 is an apocalyptic number.

It is an amenable number.

721162849 is a deficient number, since it is larger than the sum of its proper divisors (66335711).

721162849 is a wasteful number, since it uses less digits than its factorization.

721162849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64631.

The product of its digits is 48384, while the sum is 40.

The square root of 721162849 is about 26854.4753998286. The cubic root of 721162849 is about 896.7632080210.

The spelling of 721162849 in words is "seven hundred twenty-one million, one hundred sixty-two thousand, eight hundred forty-nine".