37481621 has 4 divisors (see below), whose sum is σ = 37501932. Its totient is φ = 37461312.

The previous prime is 37481599. The next prime is 37481657. The reversal of 37481621 is 12618473.

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 15288100 + 22193521 = 3910^2 + 4711^2 .

It is a cyclic number.

It is not a de Polignac number, because 37481621 - 2⁶ = 37481557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37481221) 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, 7076 + ... + 11181.

It is an arithmetic number, because the mean of its divisors is an integer number (9375483).

Almost surely, 2^37481621 is an apocalyptic number.

It is an amenable number.

37481621 is a deficient number, since it is larger than the sum of its proper divisors (20311).

37481621 is a wasteful number, since it uses less digits than its factorization.

37481621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20310.

The product of its digits is 8064, while the sum is 32.

The square root of 37481621 is about 6122.2235339785. The cubic root of 37481621 is about 334.6617838467.

The spelling of 37481621 in words is "thirty-seven million, four hundred eighty-one thousand, six hundred twenty-one".