3724579021 has 4 divisors (see below), whose sum is σ = 3724842592. Its totient is φ = 3724315452.

The previous prime is 3724579009. The next prime is 3724579039. The reversal of 3724579021 is 1209754273.

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.

It is a cyclic number.

It is not a de Polignac number, because 3724579021 - 2²⁷ = 3590361293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3724579051) 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 3 ways as a sum of consecutive naturals, for example, 109311 + ... + 139276.

It is an arithmetic number, because the mean of its divisors is an integer number (931210648).

Almost surely, 2^3724579021 is an apocalyptic number.

It is an amenable number.

3724579021 is a deficient number, since it is larger than the sum of its proper divisors (263571).

3724579021 is a wasteful number, since it uses less digits than its factorization.

3724579021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263570.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 3724579021 is about 61029.3291868754. The cubic root of 3724579021 is about 1550.0976727906.

The spelling of 3724579021 in words is "three billion, seven hundred twenty-four million, five hundred seventy-nine thousand, twenty-one".