3387245821 has 4 divisors (see below), whose sum is σ = 3418902432. Its totient is φ = 3355589212.

The previous prime is 3387245747. The next prime is 3387245839. The reversal of 3387245821 is 1285427833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1285427833 = 127 ⋅10121479.

It is a cyclic number.

It is not a de Polignac number, because 3387245821 - 2²⁹ = 2850374909 is a prime.

It is a super-2 number, since 2×3387245821² = 22946868503763928082, 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 (3387249821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15828145 + ... + 15828358.

It is an arithmetic number, because the mean of its divisors is an integer number (854725608).

Almost surely, 2^3387245821 is an apocalyptic number.

It is an amenable number.

3387245821 is a deficient number, since it is larger than the sum of its proper divisors (31656611).

3387245821 is a wasteful number, since it uses less digits than its factorization.

3387245821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31656610.

The product of its digits is 322560, while the sum is 43.

The square root of 3387245821 is about 58200.0500085696. The cubic root of 3387245821 is about 1501.8120059120.

The spelling of 3387245821 in words is "three billion, three hundred eighty-seven million, two hundred forty-five thousand, eight hundred twenty-one".