536487781 has 8 divisors (see below), whose sum is σ = 565104800. Its totient is φ = 507908880.

The previous prime is 536487769. The next prime is 536487793. The reversal of 536487781 is 187784635.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (536487769) and next prime (536487793).

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 536487781 - 2¹³ = 536479589 is a prime.

It is a super-2 number, since 2×536487781² = 575638278324607922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (536487701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22090 + ... + 39508.

It is an arithmetic number, because the mean of its divisors is an integer number (70638100).

Almost surely, 2^536487781 is an apocalyptic number.

It is an amenable number.

536487781 is a deficient number, since it is larger than the sum of its proper divisors (28617019).

536487781 is a wasteful number, since it uses less digits than its factorization.

536487781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19059.

The product of its digits is 1128960, while the sum is 49.

The square root of 536487781 is about 23162.2058750888. The cubic root of 536487781 is about 812.5559565722. Note that the first 3 decimals are identical.

The spelling of 536487781 in words is "five hundred thirty-six million, four hundred eighty-seven thousand, seven hundred eighty-one".