37900981 has 4 divisors (see below), whose sum is σ = 38155500. Its totient is φ = 37646464.

The previous prime is 37900979. The next prime is 37901011. The reversal of 37900981 is 18900973.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10432900 + 27468081 = 3230^2 + 5241^2 .

It is a cyclic number.

It is not a de Polignac number, because 37900981 - 2¹ = 37900979 is a prime.

It is a super-3 number, since 3×37900981³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 37900981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37900901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127036 + ... + 127333.

It is an arithmetic number, because the mean of its divisors is an integer number (9538875).

Almost surely, 2^37900981 is an apocalyptic number.

It is an amenable number.

37900981 is a deficient number, since it is larger than the sum of its proper divisors (254519).

37900981 is a wasteful number, since it uses less digits than its factorization.

37900981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254518.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 37900981 is about 6156.3772626440. The cubic root of 37900981 is about 335.9052696146.

The spelling of 37900981 in words is "thirty-seven million, nine hundred thousand, nine hundred eighty-one".