37979917609 has 4 divisors (see below), whose sum is σ = 37980478404. Its totient is φ = 37979356816.

The previous prime is 37979917559. The next prime is 37979917621. The reversal of 37979917609 is 90671997973.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90671997973 = 12829 ⋅7067737.

It can be written as a sum of positive squares in 2 ways, for example, as 35719866009 + 2260051600 = 188997^2 + 47540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-37979917609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37979917649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162202 + ... + 319795.

It is an arithmetic number, because the mean of its divisors is an integer number (9495119601).

Almost surely, 2^37979917609 is an apocalyptic number.

It is an amenable number.

37979917609 is a deficient number, since it is larger than the sum of its proper divisors (560795).

37979917609 is an equidigital number, since it uses as much as digits as its factorization.

37979917609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560794.

The product of its (nonzero) digits is 40507614, while the sum is 67.

The spelling of 37979917609 in words is "thirty-seven billion, nine hundred seventy-nine million, nine hundred seventeen thousand, six hundred nine".