37879121997 has 12 divisors (see below), whose sum is σ = 55198486044. Its totient is φ = 25029271680.

The previous prime is 37879121983. The next prime is 37879122089. The reversal of 37879121997 is 79912197873.

It is a happy number.

37879121997 is a `hidden beast` number, since 378 + 79 + 1 + 2 + 199 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 874444041 + 37004677956 = 29571^2 + 192366^2 .

It is not a de Polignac number, because 37879121997 - 2¹⁰ = 37879120973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37879121957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18621954 + ... + 18623987.

It is an arithmetic number, because the mean of its divisors is an integer number (4599873837).

Almost surely, 2^37879121997 is an apocalyptic number.

It is an amenable number.

37879121997 is a deficient number, since it is larger than the sum of its proper divisors (17319364047).

37879121997 is a wasteful number, since it uses less digits than its factorization.

37879121997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37246060 (or 37246057 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 63.

The spelling of 37879121997 in words is "thirty-seven billion, eight hundred seventy-nine million, one hundred twenty-one thousand, nine hundred ninety-seven".