3700720409 has 2 divisors, whose sum is σ = 3700720410. Its totient is φ = 3700720408.

The previous prime is 3700720403. The next prime is 3700720453. The reversal of 3700720409 is 9040270073.

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., 3668967184 + 31753225 = 60572^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 3700720409 - 2²⁸ = 3432284953 is a prime.

It is not a weakly prime, because it can be changed into another prime (3700720403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1850360204 + 1850360205.

It is an arithmetic number, because the mean of its divisors is an integer number (1850360205).

Almost surely, 2^3700720409 is an apocalyptic number.

It is an amenable number.

3700720409 is a deficient number, since it is larger than the sum of its proper divisors (1).

3700720409 is an equidigital number, since it uses as much as digits as its factorization.

3700720409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 3700720409 is about 60833.5467402649. The cubic root of 3700720409 is about 1546.7807494615.

The spelling of 3700720409 in words is "three billion, seven hundred million, seven hundred twenty thousand, four hundred nine".