37491 has 4 divisors (see below), whose sum is σ = 49992. Its totient is φ = 24992.

The previous prime is 37489. The next prime is 37493. The reversal of 37491 is 19473.

37491 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19473 = 3 ⋅6491.

It is an interprime number because it is at equal distance from previous prime (37489) and next prime (37493).

It is a cyclic number.

It is not a de Polignac number, because 37491 - 2¹ = 37489 is a prime.

It is a D-number.

37491 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (37493) 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, 6246 + ... + 6251.

It is an arithmetic number, because the mean of its divisors is an integer number (12498).

2³⁷⁴⁹¹ is an apocalyptic number.

37491 is a deficient number, since it is larger than the sum of its proper divisors (12501).

37491 is a wasteful number, since it uses less digits than its factorization.

37491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12500.

The product of its digits is 756, while the sum is 24.

The square root of 37491 is about 193.6259280159. The cubic root of 37491 is about 33.4689695581.

It can be divided in two parts, 374 and 91, that added together give a triangular number (465 = T₃₀).

The spelling of 37491 in words is "thirty-seven thousand, four hundred ninety-one".