3891037 has 2 divisors, whose sum is σ = 3891038. Its totient is φ = 3891036.

The previous prime is 3890981. The next prime is 3891049. The reversal of 3891037 is 7301983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3463321 + 427716 = 1861^2 + 654^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3891037 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3891077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1945518 + 1945519.

It is an arithmetic number, because the mean of its divisors is an integer number (1945519).

Almost surely, 2^3891037 is an apocalyptic number.

It is an amenable number.

3891037 is a deficient number, since it is larger than the sum of its proper divisors (1).

3891037 is an equidigital number, since it uses as much as digits as its factorization.

3891037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 3891037 is about 1972.5711647492. The cubic root of 3891037 is about 157.2854153405.

The spelling of 3891037 in words is "three million, eight hundred ninety-one thousand, thirty-seven".