37680391 has 4 divisors (see below), whose sum is σ = 43063312. Its totient is φ = 32297472.

The previous prime is 37680359. The next prime is 37680397. The reversal of 37680391 is 19308673.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19308673 = 593 ⋅32561.

It is a cyclic number.

It is not a de Polignac number, because 37680391 - 2⁵ = 37680359 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 37680391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37680397) 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, 2691450 + ... + 2691463.

It is an arithmetic number, because the mean of its divisors is an integer number (10765828).

Almost surely, 2^37680391 is an apocalyptic number.

37680391 is a deficient number, since it is larger than the sum of its proper divisors (5382921).

37680391 is an equidigital number, since it uses as much as digits as its factorization.

37680391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5382920.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 37680391 is about 6138.4355498775. The cubic root of 37680391 is about 335.2523264186.

The spelling of 37680391 in words is "thirty-seven million, six hundred eighty thousand, three hundred ninety-one".