37138321 has 8 divisors (see below), whose sum is σ = 40709088. Its totient is φ = 33600000.

The previous prime is 37138313. The next prime is 37138327. The reversal of 37138321 is 12383173.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 37138321 - 2³ = 37138313 is a prime.

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 37138321.

It is not an unprimeable number, because it can be changed into a prime (37138327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5680 + ... + 10321.

It is an arithmetic number, because the mean of its divisors is an integer number (5088636).

Almost surely, 2^37138321 is an apocalyptic number.

It is an amenable number.

37138321 is a deficient number, since it is larger than the sum of its proper divisors (3570767).

37138321 is a wasteful number, since it uses less digits than its factorization.

37138321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16223.

The product of its digits is 3024, while the sum is 28.

The square root of 37138321 is about 6094.1218399372. The cubic root of 37138321 is about 333.6369086643.

The spelling of 37138321 in words is "thirty-seven million, one hundred thirty-eight thousand, three hundred twenty-one".