485542991 has 4 divisors (see below), whose sum is σ = 487271184. Its totient is φ = 483814800.

The previous prime is 485542979. The next prime is 485542997. The reversal of 485542991 is 199245584.

It is a happy number.

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 485542991 - 2¹⁸ = 485280847 is a prime.

It is a super-2 number, since 2×485542991² = 471503992218452162, 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 (485542997) 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, 863675 + ... + 864236.

It is an arithmetic number, because the mean of its divisors is an integer number (121817796).

Almost surely, 2^485542991 is an apocalyptic number.

485542991 is a deficient number, since it is larger than the sum of its proper divisors (1728193).

485542991 is a wasteful number, since it uses less digits than its factorization.

485542991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728192.

The product of its digits is 518400, while the sum is 47.

The square root of 485542991 is about 22035.0400725753. The cubic root of 485542991 is about 785.9759001518.

The spelling of 485542991 in words is "four hundred eighty-five million, five hundred forty-two thousand, nine hundred ninety-one".