37921081 has 8 divisors (see below), whose sum is σ = 41609664. Its totient is φ = 34272720.

The previous prime is 37921063. The next prime is 37921087. The reversal of 37921081 is 18012973.

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 37921081 - 2¹¹ = 37919033 is a prime.

It is a super-2 number, since 2×37921081² = 2876016768417122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (37921087) 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, 8061 + ... + 11866.

It is an arithmetic number, because the mean of its divisors is an integer number (5201208).

Almost surely, 2^37921081 is an apocalyptic number.

It is an amenable number.

37921081 is a deficient number, since it is larger than the sum of its proper divisors (3688583).

37921081 is a wasteful number, since it uses less digits than its factorization.

37921081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20111.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 37921081 is about 6158.0094998303. The cubic root of 37921081 is about 335.9646392540.

The spelling of 37921081 in words is "thirty-seven million, nine hundred twenty-one thousand, eighty-one".