3744677721 has 4 divisors (see below), whose sum is σ = 4992903632. Its totient is φ = 2496451812.

The previous prime is 3744677711. The next prime is 3744677731. The reversal of 3744677721 is 1277764473.

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 an interprime number because it is at equal distance from previous prime (3744677711) and next prime (3744677731).

It is not a de Polignac number, because 3744677721 - 2⁵ = 3744677689 is a prime.

It is a super-2 number, since 2×3744677721² = 28045222468307507682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3744677711) 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, 624112951 + ... + 624112956.

It is an arithmetic number, because the mean of its divisors is an integer number (1248225908).

Almost surely, 2^3744677721 is an apocalyptic number.

It is an amenable number.

3744677721 is a deficient number, since it is larger than the sum of its proper divisors (1248225911).

3744677721 is a wasteful number, since it uses less digits than its factorization.

3744677721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248225910.

The product of its digits is 1382976, while the sum is 48.

The square root of 3744677721 is about 61193.7719134881. The cubic root of 3744677721 is about 1552.8809023873.

The spelling of 3744677721 in words is "three billion, seven hundred forty-four million, six hundred seventy-seven thousand, seven hundred twenty-one".