3747322421 has 4 divisors (see below), whose sum is σ = 3753114912. Its totient is φ = 3741529932.

The previous prime is 3747322409. The next prime is 3747322433. The reversal of 3747322421 is 1242237473.

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 (3747322409) and next prime (3747322433).

It is a cyclic number.

It is not a de Polignac number, because 3747322421 - 2¹⁰ = 3747321397 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 (3747322451) 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, 2895275 + ... + 2896568.

It is an arithmetic number, because the mean of its divisors is an integer number (938278728).

Almost surely, 2^3747322421 is an apocalyptic number.

It is an amenable number.

3747322421 is a deficient number, since it is larger than the sum of its proper divisors (5792491).

3747322421 is an equidigital number, since it uses as much as digits as its factorization.

3747322421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792490.

The product of its digits is 56448, while the sum is 35.

The square root of 3747322421 is about 61215.3773246559. The cubic root of 3747322421 is about 1553.2463933557.

Adding to 3747322421 its reverse (1242237473), we get a palindrome (4989559894).

The spelling of 3747322421 in words is "three billion, seven hundred forty-seven million, three hundred twenty-two thousand, four hundred twenty-one".