491231429587 has 8 divisors (see below), whose sum is σ = 492555926016. Its totient is φ = 489907152192.

The previous prime is 491231429581. The next prime is 491231429593. The reversal of 491231429587 is 785924132194.

It is an interprime number because it is at equal distance from previous prime (491231429581) and next prime (491231429593).

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 491231429587 - 2³⁵ = 456871691219 is a prime.

It is a super-3 number, since 3×491231429587³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491231429581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083183 + ... + 5178919.

It is an arithmetic number, because the mean of its divisors is an integer number (61569490752).

Almost surely, 2^491231429587 is an apocalyptic number.

491231429587 is a deficient number, since it is larger than the sum of its proper divisors (1324496429).

491231429587 is a wasteful number, since it uses less digits than its factorization.

491231429587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109517.

The product of its digits is 4354560, while the sum is 55.

The spelling of 491231429587 in words is "four hundred ninety-one billion, two hundred thirty-one million, four hundred twenty-nine thousand, five hundred eighty-seven".