3757981 has 2 divisors, whose sum is σ = 3757982. Its totient is φ = 3757980.

The previous prime is 3757961. The next prime is 3758017. The reversal of 3757981 is 1897573.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2528100 + 1229881 = 1590^2 + 1109^2 .

It is an emirp because it is prime and its reverse (1897573) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3757981 - 2¹⁵ = 3725213 is a prime.

It is a super-2 number, since 2×3757981² = 28244842392722, which contains 22 as substring.

It is a Chen prime.

3757981 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3757931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1878990 + 1878991.

It is an arithmetic number, because the mean of its divisors is an integer number (1878991).

Almost surely, 2^3757981 is an apocalyptic number.

It is an amenable number.

3757981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3757981 is an equidigital number, since it uses as much as digits as its factorization.

3757981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 40.

The square root of 3757981 is about 1938.5512631860. The cubic root of 3757981 is about 155.4717641891.

The spelling of 3757981 in words is "three million, seven hundred fifty-seven thousand, nine hundred eighty-one".