3734812821 has 16 divisors (see below), whose sum is σ = 5209358400. Its totient is φ = 2377001088.

The previous prime is 3734812813. The next prime is 3734812889. The reversal of 3734812821 is 1282184373.

It is not a de Polignac number, because 3734812821 - 2³ = 3734812813 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3734812821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3734812811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233431 + ... + 248916.

It is an arithmetic number, because the mean of its divisors is an integer number (325584900).

Almost surely, 2^3734812821 is an apocalyptic number.

It is an amenable number.

3734812821 is a deficient number, since it is larger than the sum of its proper divisors (1474545579).

3734812821 is a wasteful number, since it uses less digits than its factorization.

3734812821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482468.

The product of its digits is 64512, while the sum is 39.

The square root of 3734812821 is about 61113.1149672474. The cubic root of 3734812821 is about 1551.5160776317.

The spelling of 3734812821 in words is "three billion, seven hundred thirty-four million, eight hundred twelve thousand, eight hundred twenty-one".