3731491 has 2 divisors, whose sum is σ = 3731492. Its totient is φ = 3731490.

The previous prime is 3731489. The next prime is 3731509. The reversal of 3731491 is 1941373.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3731491 - 2¹ = 3731489 is a prime.

Together with 3731489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3731461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1865745 + 1865746.

It is an arithmetic number, because the mean of its divisors is an integer number (1865746).

Almost surely, 2^3731491 is an apocalyptic number.

3731491 is a deficient number, since it is larger than the sum of its proper divisors (1).

3731491 is an equidigital number, since it uses as much as digits as its factorization.

3731491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 3731491 is about 1931.7067582840. The cubic root of 3731491 is about 155.1055957524.

The spelling of 3731491 in words is "three million, seven hundred thirty-one thousand, four hundred ninety-one".