3742991009 has 4 divisors (see below), whose sum is σ = 3743181504. Its totient is φ = 3742800516.

The previous prime is 3742990967. The next prime is 3742991011. The reversal of 3742991009 is 9001992473.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9001992473 = 17 ⋅529528969.

It is a cyclic number.

It is not a de Polignac number, because 3742991009 - 2⁸ = 3742990753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3742991509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61877 + ... + 106370.

It is an arithmetic number, because the mean of its divisors is an integer number (935795376).

Almost surely, 2^3742991009 is an apocalyptic number.

It is an amenable number.

3742991009 is a deficient number, since it is larger than the sum of its proper divisors (190495).

3742991009 is a wasteful number, since it uses less digits than its factorization.

3742991009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190494.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 3742991009 is about 61179.9886319048. The cubic root of 3742991009 is about 1552.6477130975.

The spelling of 3742991009 in words is "three billion, seven hundred forty-two million, nine hundred ninety-one thousand, nine".