3900749 has 2 divisors, whose sum is σ = 3900750. Its totient is φ = 3900748.

The previous prime is 3900737. The next prime is 3900779. The reversal of 3900749 is 9470093.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3396649 + 504100 = 1843^2 + 710^2 .

It is a cyclic number.

It is not a de Polignac number, because 3900749 - 2⁴ = 3900733 is a prime.

It is a super-2 number, since 2×3900749² = 30431685522002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3900779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950374 + 1950375.

It is an arithmetic number, because the mean of its divisors is an integer number (1950375).

Almost surely, 2^3900749 is an apocalyptic number.

It is an amenable number.

3900749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3900749 is an equidigital number, since it uses as much as digits as its factorization.

3900749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 3900749 is about 1975.0313921556. The cubic root of 3900749 is about 157.4161676987.

The spelling of 3900749 in words is "three million, nine hundred thousand, seven hundred forty-nine".