52491687 has 8 divisors (see below), whose sum is σ = 70500336. Its totient is φ = 34738752.

The previous prime is 52491683. The next prime is 52491697. The reversal of 52491687 is 78619425.

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

It is not a de Polignac number, because 52491687 - 2² = 52491683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52491683) 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, 63448 + ... + 64269.

It is an arithmetic number, because the mean of its divisors is an integer number (8812542).

Almost surely, 2^52491687 is an apocalyptic number.

52491687 is a deficient number, since it is larger than the sum of its proper divisors (18008649).

52491687 is a wasteful number, since it uses less digits than its factorization.

52491687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127857.

The product of its digits is 120960, while the sum is 42.

The square root of 52491687 is about 7245.1146988850. The cubic root of 52491687 is about 374.4238548269.

The spelling of 52491687 in words is "fifty-two million, four hundred ninety-one thousand, six hundred eighty-seven".