45731687 has 4 divisors (see below), whose sum is σ = 46847136. Its totient is φ = 44616240.

The previous prime is 45731681. The next prime is 45731711. The reversal of 45731687 is 78613754.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45731687 - 2¹⁶ = 45666151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1115407 = 45731687 / (4 + 5 + 7 + 3 + 1 + 6 + 8 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45731681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557663 + ... + 557744.

It is an arithmetic number, because the mean of its divisors is an integer number (11711784).

Almost surely, 2^45731687 is an apocalyptic number.

45731687 is a deficient number, since it is larger than the sum of its proper divisors (1115449).

45731687 is a wasteful number, since it uses less digits than its factorization.

45731687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115448.

The product of its digits is 141120, while the sum is 41.

The square root of 45731687 is about 6762.5207578240. The cubic root of 45731687 is about 357.6067772398.

The spelling of 45731687 in words is "forty-five million, seven hundred thirty-one thousand, six hundred eighty-seven".