3773921 has 2 divisors, whose sum is σ = 3773922. Its totient is φ = 3773920.

The previous prime is 3773911. The next prime is 3773941. The reversal of 3773921 is 1293773.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2927521 + 846400 = 1711^2 + 920^2 .

It is a cyclic number.

It is not a de Polignac number, because 3773921 - 2¹⁸ = 3511777 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3773911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1886960 + 1886961.

It is an arithmetic number, because the mean of its divisors is an integer number (1886961).

Almost surely, 2^3773921 is an apocalyptic number.

It is an amenable number.

3773921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3773921 is an equidigital number, since it uses as much as digits as its factorization.

3773921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938, while the sum is 32.

The square root of 3773921 is about 1942.6582303637. The cubic root of 3773921 is about 155.6912725057.

The spelling of 3773921 in words is "three million, seven hundred seventy-three thousand, nine hundred twenty-one".