3731509 has 2 divisors, whose sum is σ = 3731510. Its totient is φ = 3731508.

The previous prime is 3731491. The next prime is 3731513. The reversal of 3731509 is 9051373.

3731509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2528100 + 1203409 = 1590^2 + 1097^2 .

It is an emirp because it is prime and its reverse (9051373) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3731509 - 2⁵ = 3731477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3731549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1865754 + 1865755.

It is an arithmetic number, because the mean of its divisors is an integer number (1865755).

Almost surely, 2^3731509 is an apocalyptic number.

It is an amenable number.

3731509 is a deficient number, since it is larger than the sum of its proper divisors (1).

3731509 is an equidigital number, since it uses as much as digits as its factorization.

3731509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 3731509 is about 1931.7114173706. The cubic root of 3731509 is about 155.1058451520.

The spelling of 3731509 in words is "three million, seven hundred thirty-one thousand, five hundred nine".