3437973721 has 16 divisors (see below), whose sum is σ = 4317712000. Its totient is φ = 2720151504.

The previous prime is 3437973713. The next prime is 3437973727. The reversal of 3437973721 is 1273797343.

It is not a de Polignac number, because 3437973721 - 2³ = 3437973713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3437973727) 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 15 ways as a sum of consecutive naturals, for example, 381051 + ... + 389968.

It is an arithmetic number, because the mean of its divisors is an integer number (269857000).

Almost surely, 2^3437973721 is an apocalyptic number.

It is an amenable number.

3437973721 is a deficient number, since it is larger than the sum of its proper divisors (879738279).

3437973721 is an equidigital number, since it uses as much as digits as its factorization.

3437973721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771053 (or 771039 counting only the distinct ones).

The product of its digits is 666792, while the sum is 46.

The square root of 3437973721 is about 58634.2367648800. The cubic root of 3437973721 is about 1509.2720086276.

The spelling of 3437973721 in words is "three billion, four hundred thirty-seven million, nine hundred seventy-three thousand, seven hundred twenty-one".