3437207721 has 12 divisors (see below), whose sum is σ = 4975226880. Its totient is φ = 2286685080.

The previous prime is 3437207681. The next prime is 3437207723. The reversal of 3437207721 is 1277027343.

It is a happy number.

It is not a de Polignac number, because 3437207721 - 2⁷ = 3437207593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3437207723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394345 + ... + 402966.

It is an arithmetic number, because the mean of its divisors is an integer number (414602240).

Almost surely, 2^3437207721 is an apocalyptic number.

It is an amenable number.

3437207721 is a deficient number, since it is larger than the sum of its proper divisors (1538019159).

3437207721 is a wasteful number, since it uses less digits than its factorization.

3437207721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797796 (or 797793 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 36.

The square root of 3437207721 is about 58627.7043811200. The cubic root of 3437207721 is about 1509.1599088536.

The spelling of 3437207721 in words is "three billion, four hundred thirty-seven million, two hundred seven thousand, seven hundred twenty-one".