3299238721 has 9 divisors (see below), whose sum is σ = 3350502883. Its totient is φ = 3248749840.

The previous prime is 3299238697. The next prime is 3299238727. The reversal of 3299238721 is 1278329923.

The square root of 3299238721 is 57439.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2904024321 + 395214400 = 53889^2 + 19880^2 .

It is not a de Polignac number, because 3299238721 - 2¹¹ = 3299236673 is a prime.

It is a super-2 number, since 2×3299238721² = 21769952276291431682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3299238727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4077765 + ... + 4078573.

Almost surely, 2^3299238721 is an apocalyptic number.

3299238721 is the 57439-th square number.

3299238721 is the 28720-th centered octagonal number.

It is an amenable number.

3299238721 is a deficient number, since it is larger than the sum of its proper divisors (51264162).

3299238721 is an frugal number, since it uses more digits than its factorization.

3299238721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760 (or 880 counting only the distinct ones).

The product of its digits is 326592, while the sum is 46.

The cubic root of 3299238721 is about 1488.6910596641.

The spelling of 3299238721 in words is "three billion, two hundred ninety-nine million, two hundred thirty-eight thousand, seven hundred twenty-one".